| 2240807 | Composite, with 4 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 | 159 / 640 |
Estimated T-Level: 26.2 ⓘ TF below 2^82 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Martin Fahlgren | 9B7FFD789833DDF8 | 0 | Linux 32-bit,Prime95,v13,(aka WP2) | | Factored | 1999-02-14 | Robert S. Frye | 9B7FFD789833DDF8 | 418372 | Windows,Prime95,v17,(aka WT1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-09-30 | alpertron | D0D81F12395E3EC3 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-28 | Oliver Kruse | D0D81F12395E3EC3 | 1 | 2022535 | 1 | 3 | | Factored | Certified Good | 2025-02-19 | Anton Tsvetkov | 8CCCBCB5070D886D | 2 | 823899 | 5 | 3 | | Verified | Certified Good | 2025-08-27 | kutens | 8CCCBCB5070D886D | 4 | 1563487 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-08-27 | ondrejch | CERT | Proof certified good | | 2025-08-27 | kutens | C-PRP | M2240807/12857916030206498599463/3300893910014754237392903/5260132169331150728830439/8692395820734928319824727 : 8CCCBCB5070D886D Proof Certified Good
Proof Power: 7
| | 2025-08-19 | TJAOI | F-ECM | Factor: 5260132169331150728830439 / ECM curve 23, B1=250000, B2=254050335, Edwards Sigma=5178314616216355 | | 2025-08-19 | TJAOI | F-ECM | Factor: 8692395820734928319824727 / ECM curve 6, B1=250000, B2=254050335, Edwards Sigma=5365982917461381 | | 2025-02-19 | 69-bit_color_depth | CERT | Proof certified good | | 2025-02-19 | Anton Tsvetkov | C-PRP | M2240807/3300893910014754237392903/12857916030206498599463 : 8CCCBCB5070D886D Proof Certified Good
Proof Power: 7
| | 2025-02-19 | Anton Tsvetkov | F-ECM | Factor: 12857916030206498599463 / ECM curve 22, B1=88209, B2=36031710, Edwards Sigma=4322193339589420 | | 2022-03-09 | LordJulius | NF | no factor TF: 1-60 | | 2017-10-28 | Oliver Kruse | C-PRP | M2240807/3300893910014754237392903 : D0D81F12395E3EC3 | | 2017-09-30 | alpertron | C-PRP | M2240807/3300893910014754237392903 : D0D81F12395E3EC3 | | 2016-04-24 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2015-12-03 | Alexander Dubrovin | F-PM1 | Factor: 3300893910014754237392903 / B1=1000000, B2=6000000 | | 2015-10-26 | 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 | | 2014-08-25 | -anonymous- | NF-PM1 | B1=128643 | | 2013-08-21 | David Campeau | NF | no factor TF: 62-63 | | 2012-05-03 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-01-08 | markr | NF-PM1 | B1=100000, B2=2050000, E=6 | | 2010-11-10 | Joss | NF-PM1 | B1=30000 | | 2009-01-11 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-03-27 | -anonymous- | NF-PM1 | B1=2048, B2=204800, E=12 | | 1999-02-14 | -anonymous- | C-LL | 9B7FFD789833DDF8 | | 1999-02-07 | -anonymous- | NF | no factor TF: 1-58 |
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