| 1311259 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 260 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 105 / 640 |
Estimated T-Level: 25.8 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Joel Armengaud | F86020380C562102 | 0 | Windows,Prime95,v11,(aka WC) | | Factored | | Cornelius Caesar | F86020380C562102 | 0 | Mac,John Sweeney,vLL1.0b1,(aka J4) | | Factored | | Brian J. Beesley | F86020380C562102 | 627620 | Linux 32-bit,Prime95,v24 final,(aka Wc2) |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=6 | 2025-09-01 | Kriesel | F84CE6ADAB97EE76 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-09-30 | Oliver Kruse | B32685BD5196ED04 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-23 | kkmrkkblmbrbk | B32685BD5196ED04 | 1 | 1095312 | 1 | 3 | | Verified | PRP without proof (not generated) | 2018-04-29 | Oliver Kruse | F84CE6ADAB97EE76 | 2 | 1072062 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-05-01 | storm5510 | F84CE6ADAB97EE76 | 2 | 594913 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-03 | Oliver Kruse | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | F84CE6ADAB97EE76 Proof Certified Good
Proof Power: 6
| | 2022-03-07 | LordJulius | NF | no factor TF: 58-60 | | 2018-05-01 | storm5510 | C-PRP | M1311259/143617400373537380697959584489/52429263099346706629921 : F84CE6ADAB97EE76 | | 2018-04-29 | Oliver Kruse | C-PRP | M1311259/143617400373537380697959584489/52429263099346706629921 : F84CE6ADAB97EE76 | | 2018-04-27 | TJAOI | F-ECM | Factor: 52429263099346706629921 | | 2017-10-23 | kkmrkkblmbrbk | C-PRP | M1311259/143617400373537380697959584489 : B32685BD5196ED04 | | 2017-09-30 | Oliver Kruse | C-PRP | M1311259/143617400373537380697959584489 : B32685BD5196ED04 | | 2016-03-17 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2009-02-18 | Sturle Sunde | F-ECM | Factor: 143617400373537380697959584489 | | 2009-02-14 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-16 | eteo | NF-PM1 | B1=200000, B2=2000000, E=6 | | 2003-06-17 | -anonymous- | NF | no factor TF: 1-58 | | 2001-11-03 | -anonymous- | NF | no factor TF: 1-57 |
|
