| 2267983 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 146 / 640 |
Estimated T-Level: 26.1 ⓘ TF below 2^82 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-11-07 | Wim de Lange | 5B1174534EFBCA5A | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Factored | 1999-07-04 | Ann Youmans | 5B1174534EFBCA5A | 1375446 | Windows,Prime95,v18,(aka WU1) |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=7 | 2026-01-21 | VGDominion | 272757FDA46475B2 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-10 | Oliver Kruse | B4E6E6D687CBB2CC | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-21 | storm5510 | B4E6E6D687CBB2CC | 1 | 228839 | 1 | 3 | | Verified | Certified Good | 2026-01-24 | Jason Lynch | 272757FDA46475B2 | 2 | 489204 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2026-01-24 | iczerjones | CERT | Proof certified good | | 2026-01-24 | Jason Lynch | C-PRP | Proof Certified Good
Proof Power: 7
| | 2026-01-21 | Quevvy | CERT | Proof certified good | | 2026-01-21 | VGDominion | C-PRP | 272757FDA46475B2 Proof Certified Good
Proof Power: 7
| | 2026-01-16 | TJAOI | F-ECM | Factor: 27197004757125196129351 / ECM curve 6, B1=250000, B2=252249855, Edwards Sigma=7725826394651731 | | 2017-11-21 | storm5510 | C-PRP | M2267983/35522036860990504219039 : B4E6E6D687CBB2CC | | 2017-10-10 | Oliver Kruse | C-PRP | M2267983/35522036860990504219039 : B4E6E6D687CBB2CC | | 2016-04-24 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2016-04-03 | Joss | F-PM1 | Factor: 35522036860990504219039 / B1=373248, B2=6718464 | | 2016-04-02 | Joss | NF-PM1 | B1=311040 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2015-10-31 | ramgeis | NF | no factor TF: 65-66 | | 2015-03-10 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-03-10 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-09-02 | Joss | NF-PM1 | B1=128300 | | 2013-12-06 | Jerry Hallett | NF | no factor TF: 62-63 | | 2012-05-06 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-01-03 | markr | NF-PM1 | B1=100000, B2=2100000, E=6 | | 2010-11-12 | Joss | NF-PM1 | B1=30000 | | 2010-11-06 | Joss | NF-PM1 | B1=15000 | | 2009-01-11 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-04-27 | -anonymous- | NF-PM1 | B1=2048, B2=204800, E=12 | | 1999-07-04 | -anonymous- | C-LL | 5B1174534EFBCA5A | | 1998-11-07 | -anonymous- | C-LL | 5B1174534EFBCA5A |
|
