Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
7649
Composite, with 5 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
54851508310811342.3old
342254491489418331754.9old
1113649568116275131856.6old
226484327012681574110798472684.2old
3916470788560871360051873610847320177554454928021975953174.72025-01-31 03:12:25
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000012796 / 16550
Estimated T-Level: 48.9 ⓘ
TF below 2^157 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2017-09-21Oliver Kruse28E93C3EE34AA50B4013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbk28E93C3EE34AA50B4013
Factored
No proof (small exponent)
2017-12-07ATH28E93C3EE34AA50B4651613
Factored
No proof (small exponent)
2020-04-17Oliver KruseD72CD3B75D52DF3A4570653
Factored
No proof (small exponent)
2024-02-03Wentao HuangD72CD3B75D52DF3A4262353
Verified
No proof (small exponent)
2025-01-31nordiD72CD3B75D52DF3A5387053
History
DateUserTypeResult
2025-05-28masserNF-PP1Start=136/67, B1=1300000000, B2=1298700000000
2025-01-31nordiC-PRPM7649/5485150831081/34225449148941833/111364956811627513/22648432701268157411079847/39164707885608713600518736108473201775544549280219759 : D72CD3B75D52DF3A
2025-01-31nordiF-ECMFactor: 39164707885608713600518736108473201775544549280219759 / ECM curve 11, B1=110000000, B2=4345459843725, Edwards Sigma=8176290874128399
2024-12-09yuriy_5-1NF-PM1B1=24000000000, B2=93848103835646160
2024-02-03Wentao HuangC-PRPM7649/5485150831081/34225449148941833/111364956811627513/22648432701268157411079847 : D72CD3B75D52DF3A
2021-07-08ViliamFNF-PM1B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRPM7649/5485150831081/34225449148941833/111364956811627513/22648432701268157411079847 : D72CD3B75D52DF3A
2017-12-07ATHC-PRPM7649/5485150831081/34225449148941833/111364956811627513/22648432701268157411079847 : 28E93C3EE34AA50B
2017-10-02kkmrkkblmbrbkC-PRPM7649/5485150831081/34225449148941833/111364956811627513/22648432701268157411079847 : 28E93C3EE34AA50B
2017-09-21Oliver KruseC-PRPM7649/known_factors : 28E93C3EE34AA50B