Flood Chronology in the Samaritan Pentateuch: A Comparative Study with the Masoretic Text and Septuagint

Detailed study accompanying The Samaritan Flood Chronology: From Creation to Noah’s Rest. The technical appendix supplies the complete introductory tables and counting notes.

Shem was 100 years old when he became the father of Arphaxad, two years after the flood.

— Genesis 11:10 (NET)

Genesis places the beginning of the post-Flood genealogy at a precise relationship: Shem is 100 at Arphaxad’s birth, two years after the Flood. It then gives Shem another 500 years. These figures connect the Flood generation with the generations leading to Abraham, while Noah’s 350 post-Flood years carry the older world into the new.

The Samaritan Pentateuch (SP) develops a distinctive chronological arrangement around these notices. Its pre-Flood genealogy is shorter than the Masoretic Text’s (MT), while its longer post-Flood begetting intervals move the Flood farther from Abraham. When the genealogies are compared under the same later anchors, several coherent relationships emerge: the 1656 years associated with Noah’s rest, the 100–500–500–100 arrangement around Shem, and divided spans reaching Egypt, the Exodus, and Jerusalem.

This report examines those relationships in detail. The governing dates come from the current 490d canonical tables. Some comparisons are explicitly developed in those source files; others below are direct calculations from their admitted coordinates. The distinction matters: a valid interval is an arithmetic finding, while its covenantal or prophetic significance remains an interpretation of that finding.

1. The chronological framework

The principal framework is Regular chronology, built from begetting ages with overlapping lifespans. All dates are BC coordinates in the reconstruction, anchored to the Exodus in 1446 BC and the Conquest in 1406 BC. Joshua’s regular lifespan is 1476–1366 BC, with his death in 1366 BC (File 18, §2.4; File 17, §13.3). These are reconstructed BC coordinates, not dates printed in the biblical text. The separate Cumulative method appears only in §9 and is identified there.

Unless a section says otherwise, the early dates use the full-430 comparison frame, with Terah +60 off. This aligns the sojourn framework for comparison with the normal MT. The native SP table has 215 years in Egypt within a 215 + 215 arrangement; subtracting 215 from the affected early comparison dates recovers that native frame. Exodus and Conquest remain fixed. The native-versus-comparison table displays the conversion.

Three further distinctions keep the comparisons precise:

• Gear 2 (G2) is the normal Noah/Flood alignment. Gear 1 (G1) is two years later; G3 is two years earlier. These are the research’s named alignments, not three separately transmitted manuscript chronologies.
• The SP’s one-year companion positions apply locally to Noah and Shem. They are distinct from the two-year Gear steps and from the Flood’s start-to-close interval.
• Arphaxad is fixed when the Gear changes, at held sojourn, Terah, and Cainan settings. Opening Terah +60 is a separate operation and does move the early genealogical coordinates, including Arphaxad.

The MT and SP comparisons here omit the second Cainan; the LXX retains its native second Cainan. None of these Regular tables uses the Rounded method.

1.1 Flood start, Flood close, and Arphaxad

The same year-label can serve two distinct roles. SP 3106 BC is both fixed Arphaxad and G1 Flood start; it is not G2 Flood close. The normal SP sequence remains 3108 → 3107 → 3106, from Flood start through close to Arphaxad. Each Flood has its own one-year event span.

The principal SP lives also require named pairings:

Shem’s G2 position lies 102 years before Arphaxad; the G1 Arphaxad-bound position lies 100 years before him and 98 before G2 Flood start. The table preserves the two comparisons without assigning two births to one ordinary biography. Likewise, Noah’s primary and companion deaths must be paired with their own births. The primary death retains the source’s inclusive/harmonic qualification; these annual coordinates do not specify unrecorded birthdays.

Source: File 18, §§3.1.4–3.2.1. The appendix binding table supplies the fuller field.

2. Creation, the Flood, and Noah’s rest

The corrected preferred SP Creation endpoint is 4414 BC. With G2 Flood start at 3108 and Noah’s death at 2758, the completed intervals are:

4414 → 3108 → 2758 BC = 1306 + 350 = 1656 years.

The MT gives the same total with a different endpoint: 4114 → 2458 BC = 1656, Creation to Flood start. The SP therefore places at Noah’s death the duration that the MT places at the Flood. Both ends of the SP span stand 300 years earlier than the corresponding ends of the MT span.

This is the main article’s central illustration, controlled explicitly by File 11, §8.1. Its interpretation joins Creation’s rest to the completed life of Noah, whose name is associated with rest and whose naming anticipates comfort from the cursed ground (Genesis 5:29). Noah’s death as “rest” is a theological reading; Genesis does not explicitly call that death a sabbath.

2.1 Why the Creation-to-Flood count is also called 1307

The SP begetting figures from Adam through Lamech total 707; with Noah’s 600 they give 1307. The preferred primary path coordinates Lamech’s 53rd counted year with 52 completed intervals, so the endpoint subtraction is 1306. Inclusive endpoint counting restores the recorded count: 4414 − 3108 + 1 = 1307.

The same convention preserves the three lifespans that meet the Flood boundary:

Their deaths remain at Flood start. Moving them to 3107 merely to make ordinary subtraction reproduce the lifespan counts would change the selected event assignments. The inclusive rule is not a global addition to every life: Noah’s matched dates retain 950 by ordinary subtraction, while Adam retains 930.

2.2 Lamech’s distinct midpoint

A second relationship uses Arphaxad rather than Flood start:

Creation 4414 → Lamech’s birth 3760 → Arphaxad 3106 = 654 + 654.

Lamech’s G2 birth bisects 1308 completed years. His inclusive 653-year life ends at 3108, two years before the midpoint’s terminal coordinate. Keeping those endpoint roles separate allows both relations to stand. The appendix midpoint diagram shows the distinction. Both the inclusive counts and the midpoint are explicit in File 18 §§3.1.3–3.1.4.

3. Terah’s 145/205 and the 100–500–500–100 arrangement

Terah’s lifespan supplies an important textual difference. The SP gives 145 years, while the MT gives 205. Abram departs Haran at 75 (Genesis 12:4); Acts 7:4 places his departure after his father’s death. In the SP’s normal table, 70 + 75 = 145. The corresponding 205-year arrangement requires 130 + 75 = 205, creating the familiar difference of 60.

Genesis 11:26’s list of Terah’s sons does not require all three to have been born in one year. Nevertheless, the textual SP lifespan must remain 145. The canonical study retains 205 as an architectural comparison state, and admits an explicitly opened Terah +60 alternative. It does not rewrite the Samaritan reading as 205.

Terah +60 acts upstream of Abraham. The earlier genealogical positions move by 60, while Abram’s 2166 birth and the later comparison anchors remain fixed. Thus Arphaxad-bound Shem moves from 3206 to 3266, Arphaxad from 3106 to 3166, and Shem’s death from 2606 to 2666.

These +60 positions give a balanced sequence:

Shem 3266 → Arphaxad 3166 → Shem’s death 2666 → Abram 2166 → Isaac 2066 BC.

The intervals are 100 + 500 + 500 + 100 = 1200.

490d · Detailed study · Figure D1

Shem to Isaac: 100 + 500 + 500 + 100

SP · full-430 comparison frame · Terah +60 · Gear 1 primary Shem

The five selected coordinates

3266 BCShem’s birthSP +60

↓ 100 years

3166 BCArphaxad’s birthSP +60

↓ 500 years

2666 BCShem’s deathCentral midpoint

↓ 500 years

2166 BCAbram’s birthFixed comparison anchor

↓ 100 years

2066 BCIsaac’s birthFixed comparison anchor

→100 years

→500 years

→500 years

→100 years

Schematic spacing; the printed intervals show the durations.

100 + 500 + 500 + 100 = 1200 years

600 + 600 = 1200Shem’s birth → Shem’s death → Isaac’s birth

500 + 500 = 1000Arphaxad’s birth → Shem’s death → Abram’s birth

Shem’s death bisects 1200 years: 600 before it and 600 after it.

Source controls: File 18 §§3.2.1–3.2.2.

Read the diagram’s dates and calculation

The whole-year dates use the full-430 comparison frame, with Terah +60 applied to the earlier SP chronology. The primary Arphaxad-bound Shem line is selected. Subtractions are 3266 − 3166 = 100; 3166 − 2666 = 500; 2666 − 2166 = 500; and 2166 − 2066 = 100. The outer halves are both 600 years, while Arphaxad to Abram is 1000 years. Abram at 2166 BC and Isaac at 2066 BC are fixed comparison anchors and receive no additional +60 shift. Equal visual spacing is schematic; the printed intervals carry the durations.

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Shem’s first 600 years consist of 100 before Arphaxad and 500 afterward. Another 600 years carry the sequence from Shem’s death to Isaac: 500 to Abram’s birth, then 100 to Isaac’s. Shem’s death becomes the midpoint of the 1200-year span.

The outer 100-year intervals also frame 1000 years from Arphaxad to Abram. File 18, §3.2.2 explicitly retains the 100 + 1000 + 100 architecture; the four-part form above displays its central division. These equations use the +60 arrangement, not the introductory article’s normal no+60 coordinates.

Related fourth-generation comparisons operate at different scales. Abram’s birth to Jacob’s birth gives 2166 − 2006 = 160 = 4 × 40; Abram’s birth to Isaac’s death gives 2166 − 1886 = 280 = 4 × 70. File 15, §§2–3 distinguishes the 40-, 70-, and 100-year generational units. These are structural comparisons; each interval must retain its named beginning and end.

4. From Noah and Shem to Moses

Return now to Terah +60 off, still in the full-430 frame. Selecting G1 primary Noah and Arphaxad-bound Shem gives:

Noah 3706 → Shem 3206 → Shem’s death 2606 → Moses 1526 → Conquest 1406 BC.

Shem’s birth to the Conquest is 1800 = 5 × 360. Its larger partition is 600 + 1200, with the final 1200 divided as 1080 + 120. Moses’ 120-year lifespan is given in Deuteronomy 34:7. Opening +60 instead places Shem’s death at 2666, giving 2666 − 1406 = 1260. The changed starting position is essential to that last comparison.

These are direct differences from File 18’s admitted Noah/Shem positions and fixed Mosaic anchors. The 2300 span begins at G1 Noah’s birth, 3706; it does not begin at normal G2 birth, 3708. Similarly, 1406 denotes the Conquest’s beginning and Moses’ death, while the seven-year Conquest/rest framework closes in 1399.

4.1 Joshua’s regular death and the 625-year comparison

Joshua’s Regular lifespan is 1476 → 1366 BC = 110 years. His death follows Moses’ death and the Conquest’s beginning by 40 years. The resulting sequence is Moses’ birth 1526 → Moses’ death 1406 → Joshua’s death 1366 = 120 + 40 = 160, or four 40-year units. The final 40 years describe the interval after Moses’ death, within Joshua’s longer life.

In the same full-430 comparison frame, Abraham’s 175-year life runs 2166 → 1991 BC. From his death to Joshua’s death, 1991 − 1366 = 625 = 5⁴. This is a direct comparison between Regular endpoints: Abraham’s dates follow File 18, §3.3 and its sojourn adjustment, while Joshua’s fixed dates are stated in §§2.4 and 3.4. The exact span links the patriarchal and Conquest generations; its theological significance remains an interpretation of the numerical relationship.

4.2 Noah and the Temple endpoints

Noah’s G1 life also offers comparisons with the Temple and exile. The following table keeps the +60 setting visible:

The +60 biography 3766 → 2816 preserves Noah’s 950 years, followed by 2300 to the Temple-completion target. These rows are comparisons within the project’s stated Temple and exile framework, whose 606, 536, and 516 anchors are set out in File 17, §7.3. They do not turn 3766 into a Flood date or mix G1 death with the G2 death at 2758.

5. Two halves reaching Egypt and Jerusalem

The SP’s early coordinates also form divided spans around the sojourn and affliction. File 17, §13A.9 explicitly gives three such chains:

490d · Detailed study · Figure D2

The Flood comparison: 1260 and 1290-year halves

SP · full-430 comparison frame · later targets drawn from the MT framework

1 · Gear 1 · without Terah +60

3106 → 1846 → 586 BC

3106 BCFlood start / fixed Arphaxad

↓ 1260 years

1846 BCAffliction head (model)

↓ 1260 years

586 BCJerusalem’s fall

1260 years1260 years

1260 + 1260 = 2520 years

2 · Gear 1 · with Terah +60

3166 → 1876 → 586 BC

3166 BCFlood start / fixed Arphaxad

↓ 1290 years

1876 BCEgypt entry (MT target)

↓ 1290 years

586 BCJerusalem’s fall

1290 years1290 years

1290 + 1290 = 2580 years

3 · Gear 2 · with Terah +60

3168 → 1878 → 588 BC

3168 BCFlood start

↓ 1290 years

1878 BCFamine start (MT target)

↓ 1290 years

588 BCSiege start

1290 years1290 years

1290 + 1290 = 2580 years

Each row compares its own two halves. The rows share neither an absolute-date axis nor one duration scale.

Source controls: File 17 §13A.9; File 18 §3.1.4; File 16 §§5.1.1–5.1.2.

Read the diagram’s dates and calculation

Each row has its own schematic duration scale. Row 1: 3106 − 1846 = 1260 and 1846 − 586 = 1260. Row 2: 3166 − 1876 = 1290 and 1876 − 586 = 1290. Row 3: 3168 − 1878 = 1290 and 1878 − 588 = 1290. The early coordinates are selected SP states in the full-430 comparison frame; the later targets belong to the MT comparison framework. The 1846 BC affliction head is a model inference. The 1878 BC famine start is the model’s famine coordinate, distinct from Egypt entry at 1876 BC. The equal-width bars show equality inside each row only; the first row totals 2520 and the other two total 2580 years.

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In the first row, 3106 is G1 Flood start, also the fixed Arphaxad coordinate. Its midpoint, 1846 BC, is the model’s 400-year affliction head before the Exodus: 1846 − 1446 = 400. The full span is 2520 = 7 × 360. The midpoint is not the Exodus date itself.

In the second row, the +60 starting coordinate is 3166 BC. Its midpoint is 1876, the MT Egypt-entry anchor, 430 before the Exodus. The two 1290-year halves reach the fall-of-Jerusalem anchor at 586. The complete span is 2580 = 6 × 430. The same opening also gives 3166 → 1876 → 1446 = 1290 + 430 = 1720 = 4 × 430.

The third row selects +60 G2 Flood start, 3168, and reaches the famine’s opening at 1878, then the siege opening at 588. All three coordinates stand two years earlier than those in the second row, preserving its equal 1290-year halves while changing the event labels.

These are cross-tradition comparisons: the early SP coordinates are set beside the MT sojourn/famine framework and the stated Jerusalem targets. In the native SP sojourn chronology, 1876 instead labels Abram’s call to Canaan. Sharing a year-label does not make these the same event. File 16, §§5.1.1–5.1.2 and §7 supplies the distinctions among Entry, Affliction, and Exile.

The 30-year difference between 1260 and 1290 corresponds here to the 30 years between the 1876 and 1846 heads. The +60 change at the early endpoint allows a 30-year change in each half while leaving the 586 ending coordinate fixed. This explains the relationship between the two constructions without treating 400 and 430 as interchangeable intervals.

6. Shem, the Temple, and the 2730 pattern

The +60 Arphaxad-bound Shem birth supplies another clear chain:

3266 → 966 → 536 BC = 2300 + 430 = 2730.

Here 3266 is Shem’s birth, 966 the ordinary whole-year Temple-foundation display, and 536 the restoration target. The 2300 cannot begin at Arphaxad’s 3166 coordinate: that subtraction would give only 2200 to 966.

The complete 2730 has two calendrical factorizations:

2730 = 7.5 × 364 = (7.5 × 360) + 30.

The correspondence is numerical: a span measured in years shares the integer pattern of calendar forms measured in days. It does not turn 2730 years into 7.5 ordinary solar years.

The Temple’s 966 → 536 = 430 belongs to the ordinary whole-year display explicitly retained in File 17, §5.5. That source also preserves a more precise same-month 967 → 537 comparison. Mixing one member from each would spoil the stated span. The report uses the consistent 966/536 pair throughout this chain.

With Terah +60 off, Shem’s 3206 birth instead gives 3206 − 536 = 2670 = 2 × 1335. The +60 alternative changes 2670 into 2730; both calculations require their own starting-state label.

6.1 The related Ezekiel model

Ezekiel’s symbolic actions supply 390 + 40 = 430 days, while the appearance of the divine glory includes a rainbow comparison (Ezekiel 4:4–6; 1:28). These provide both numerical and literary points of contact with the Flood study.

The canonical treatment in File 17 §13A compares Ezekiel’s dated sequence using declared 30-day months and 360-day years. In that schematic year/month display, the call-to-news span is 2700 = 7.5 × 360. A declared cycle-end leap month produces 2730 = 2700 + 30; the Enochian register independently gives the same integer as 7.5 × 364. The two readings have different calendrical explanations.

The added 30 belongs to the reconstructed intercalation scheme in File 12, §7A, rather than an unspecified extra month. Within the model, 2730 − 430 = 2300, placing the 430 of the symbolic posture alongside the 2300 component discussed with Daniel 8:14. File 17 §13A.4 explicitly develops this decomposition.

The schematic seven-year and intercalated forms likewise include 2520 = 1260 + 1260 and 2580 = 1290 + 1290. These are compared with the SP’s year-level chains in §5. The numerical correspondence is a structural interpretation across two declared scales. It is not an unqualified count of actual elapsed historical days, nor does the subtraction prove that a separately dated 2300-day period began immediately after the posture ended. The source expressly keeps this display distinct from a granular day-by-day calendar conversion.

7. The 130-year family across MT, SP, and LXX

Matching the same kind of endpoint across traditions exposes another simple arrangement:

The same differences recur among fixed Arphaxad coordinates, since each lies two years beyond its G2 Flood start. Those Arphaxad positions also give the following intervals to the shared Isaac-birth target:

These are Arphaxad-to-Isaac comparisons. Starting instead at G2 Flood would add two years to each. The LXX retains the second Cainan in these rows. Its added regular-generation interval is associated with Cainan’s 130; the current LXX table gives Arphaxad’s own begetting age as 135.

Two further legacy comparisons retain the same factor:

+60 Shem 3266 → Exodus 1446 = 1820 = 14 × 130 = 5 × 364.

G1 Noah 3706 → Isaac’s death 1886 → Jerusalem 586 = 1820 + 1300 = 3120 = 24 × 130 = 8 × 390.

In the second chain, 8 × 390 describes the entire 3120, not the final 1300. The 130 family is treated in File 02, §2.2 and File 17’s span anatomy. Its association with curse, judgment, and restoration is the study’s theological reading of the numerical recurrence.

8. The Key of 23: expanding spans with a stated anchor

The Key-of-23 operation expands a span by 25/23. A multiple of 23 therefore becomes the corresponding multiple of 25. The familiar example is 1656 = 72 × 23, which expands to 1800 = 72 × 25. File 02, §2.3 states that relation explicitly.

Two further calculations from the SP coordinates illustrate the method:

Holding the Conquest fixed, the first expansion gives 1406 + 1850 = 3256 BC. This is a generated comparison coordinate, not a replacement date for the ordinary Flood. Its distance from the original 3108 input is 148. It lies 150 before the separate Arphaxad coordinate at 3106; those two differences must not be conflated.

Holding Isaac’s birth fixed in the second calculation gives 2066 + 750 = 2816 BC. That generated coordinate coincides with the +60 G1 Noah-death position. The coincidence is an exact comparison between a span expansion and an independently admitted variant; it does not authorize moving every other birth and death by an unstated rule.

The same 60 also separates Isaac’s and Jacob’s births, 2066 → 2006. Its recurrence is suggestive within the pattern, but a shared difference does not identify Terah’s variant, a lifespan interval, and a ratio transformation as one operation. This is the distinction maintained by File 17’s operator definitions and File 46’s anchored expansion method.

9. A bounded comparison with Cumulative chronology

The original SP study also compared its Regular dates with Cumulative chronology. This requires a change of method: complete lifespans are now laid end to end. Cumulative coordinates are not additional dates for the ordinary lives already charted above.

File 18, §6C gives the SP cumulative Adam envelope as 13403–13396 BC, with 13398 as the Moses/Nisan line member. It retains the official SP Terah lifespan of 145 and Lamech’s 653. Its cumulative Joshua extension ends at 1296 BC.

These declared endpoints allow three types of comparison:

The 210 × 49 comparison uses 49-year Jubilee units. It reaches Regular Arphaxad, also the G1 Flood-start coordinate; it does not reach the SP cumulative Flood. Joshua’s Regular lifespan remains 1476–1366 BC, totaling 110 years. The 110² comparison instead uses 1296 BC as the Cumulative Joshua endpoint. The two methods therefore preserve the same 110-year lifespan within different chronological constructions; 1296 does not replace Joshua’s regular death in 1366.

The two 10580 rows use matching selections. They do not mean that any combination of the displayed endpoints produces 10580. Expanding that span gives 10580 × 25/23 = 11500 = 10 × 1150 = 5 × 2300. The operation here is on the span; no further biographical relocation is implied.

For the separate MT/SP cumulative 120–480–120 arrangement and the MT 3430 = 70 × 49 connection, see Shem and the Flood: A Rounded Comparison and its technical appendix. That article explicitly marks its Rounded coordinates. The non-rounded cumulative tables remain available for the precise underlying figures.

10. The theological thread: preservation through judgment

The Flood-to-Moses comparisons have a narrative basis as well as a numerical one. Noah’s vessel and Moses’ basket both belong to the Hebrew tebah vocabulary (Genesis 6:14; Exodus 2:3). One preserves a family through the Flood; the other preserves the child who will lead Israel out of Egypt. File 23, §1 treats this as a typological bridge between the two deliverance narratives.

Within that reading, Noah’s 950 years, Shem’s 600, Moses’ 120, and the recurring sanctuary and restoration spans form a connected field of comparisons. The Temple and exile targets extend the same concern with judgment, survival, and renewed dwelling. Ezekiel’s rainbow imagery provides a further literary point of contact with the Flood covenant.

The theological argument does not require every repeated integer to establish a separate proof of scribal intention. Its strength depends on preserving the transmitted numbers, declaring the reconstruction used, and keeping the calculation distinct from the meaning proposed for it. A providential reading can encompass correspondences across textual traditions without claiming that the arithmetic alone reconstructs the intentions of each ancient editor.

The SP is therefore valuable as a chronological witness in its own right. Its shorter pre-Flood genealogy, longer post-Flood sequence, inclusive boundary counts, and Terah comparison produce relationships that complement the MT and LXX. Read with their correct endpoints, those relationships carry the study from Creation and Noah’s rest through the patriarchs, the Exodus, and the hope of restoration.

Source map

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