Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
7121
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
24109501765671341.1old
44922029930015121756089932581.9old
98169962521242382631390477277825997114339129.52021-03-09 00:52:15
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000002594 / 16550
Estimated T-Level: 45.8 ⓘ
TF below 2^147 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 Kruse5E7DA6C330317D012013
Factored
No proof (small exponent)
2017-10-12kkmrkkblmbrbk5E7DA6C330317D012361713
Factored
No proof (small exponent)
2020-04-17Oliver Kruse0E86AF00E6EC0CEB2304553
Verified
No proof (small exponent)
2021-03-09mikr0E86AF00E6EC0CEB3426753
Verified
No proof (small exponent)
2021-03-09MarkS0E86AF00E6EC0CEB3711253
History
DateUserTypeResult
2025-03-25masserNF-PP1Start=74/23, B1=1000000000, B2=999000000000
2025-03-17masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-08masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-24-anonymous-NF-PM1B1=34000000000, B2=142096338314180250
2021-12-16ANONYMOUSNF-PM1B1=100000000
2021-03-09MarkSC-PRPM7121/2410950176567/4492202993001512175608993/981699625212423826313904772778259971143 : 0E86AF00E6EC0CEB
2021-03-09mikrC-PRPM7121/2410950176567/4492202993001512175608993/981699625212423826313904772778259971143 : 0E86AF00E6EC0CEB
2021-03-09Bruno VictalF-ECMFactor: 981699625212423826313904772778259971143
2020-04-17Oliver KruseC-PRPM7121/2410950176567/4492202993001512175608993 : 0E86AF00E6EC0CEB
2017-10-12kkmrkkblmbrbkC-PRPM7121/2410950176567/4492202993001512175608993 : 5E7DA6C330317D01
2017-09-21Oliver KruseC-PRPM7121/2410950176567/4492202993001512175608993 : 5E7DA6C330317D01
2017-09-21Oliver KruseC-PRPM7121/2410950176567/4492202993001512175608993 : 5E7DA6C330317D01