| 2573653 | Composite, with 4 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 73 / 640 |
Estimated T-Level: 25.6 ⓘ TF below 2^80 is very unlikely to find new factors due to ECM effort. |
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-15 | Oliver Kruse | 49FC9776C2F47949 | 2 | 277436 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-12-01 | storm5510 | 49FC9776C2F47949 | 2 | 1446499 | 5 | 3 | | Factored | Certified Good | 2024-04-11 | Ahmed Azhad | 49FC9776C2F47949 | 3 | 698134 | 5 | 3 | | Verified | Certified Good | 2026-03-26 | JC_Herles | 49FC9776C2F47949 | 4 | 1944478 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2026-03-26 | Team_Schaub | CERT | Proof certified good | | 2026-03-26 | JC_Herles | C-PRP | M2573653/237292510358287/1986036217612417/22757252736685124125943/12434555010760376441012124809 : 49FC9776C2F47949 Proof Certified Good
Proof Power: 7
| | 2026-03-26 | JC_Herles | F-ECM | Factor: 12434555010760376441012124809 / ECM curve 109, B1=88343, B2=33629310, Edwards Sigma=2254463179114000 | | 2024-04-12 | LookAS | CERT | Proof certified good | | 2024-04-11 | Ahmed Azhad | C-PRP | M2573653/237292510358287/1986036217612417/22757252736685124125943 : 49FC9776C2F47949 Proof Certified Good
Proof Power: 7
| | 2024-04-11 | Ahmed Azhad | F-ECM | Factor: 22757252736685124125943 / ECM curve 7, B1=50000, B2=47392422, Edwards Sigma=3735614090950689 | | 2022-09-01 | USAFSS | NF-PM1 | B1=300000, B2=258641460 | | 2017-12-01 | storm5510 | C-PRP | M2573653/237292510358287/1986036217612417 : 49FC9776C2F47949 | | 2017-10-15 | Oliver Kruse | C-PRP | M2573653/237292510358287/1986036217612417 : 49FC9776C2F47949 | | 2014-03-30 | pdazzl | F | Factor: 1986036217612417 / TF: 48-54 |
|
