# C1612 — Derive both SP Jubilee observations from one reversed prefix

## Question

What common source calculation generates9800 to Conquest and11270 to AD65?

## Sources

```json
[
  "Comparative_Study §7.2",
  "C1583"
]
```

## Opened utc

2026-09-29T14:59:54.391436+00:00

## Results

```json
{
  "reversed_prefix": [
    4100,
    7100
  ],
  "sum": 11200,
  "units_original_1400": 8,
  "to_Conquest": 9800,
  "to_AD65_civil": 11270,
  "Conquest_to_AD65": 1470,
  "origin": "SP source Flood3106−Conquest1406=1700 and Nativity6−Conquest span1400"
}
```

## Finding

SP4100+7100=11200=8×1400. Subtracting one1400 gives9800; adding the civil70 from6 BC to AD65 gives11270.

## Reassessment

Compare the whole fixed six-spine Flood family so that the scope of the SP success is explicit.

## Checks

```json
{}
```

## Closed utc

2026-09-29T14:59:54.392124+00:00

## Record provenance

Exact record hash: `84bc3284f16e03779b02e3874da1bbe3ca0147a9c1023dffde7530e0139e89e1`

Source journal: `Research_Cycles/C1585_C1634/journal.json`