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

PrimeNet Exponent Status

Exponent Range:





MnDetails
2131
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
3273217721.6old
17359127824.0old
1292394582518294709839319622393096.7old
7524094632157297405257642905419857688845243144145.82008-10-16 23:57:24
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000060734 / 105362
Estimated T-Level: 57.9 ⓘ
TF below 2^187 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver Kruse0843BAC8F064E70B4013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbk0843BAC8F064E70B4013
Verified
No proof (small exponent)
2017-12-07ATH0843BAC8F064E70B416913
Verified
No proof (small exponent)
2020-04-17Oliver KruseE15C7DEFDFEF7072480853
Verified
No proof (small exponent)
2024-01-27Wentao HuangE15C7DEFDFEF70724143253
History
DateUserTypeResult
2025-04-02masserNF-PP1Start=116/71, B1=5300000000, B2=5294700000000
2024-04-25masserNF-PM1B1=100000000000, B2=192252280032302490
2024-01-27Wentao HuangC-PRPM2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : E15C7DEFDFEF7072
2020-04-17Oliver KruseC-PRPM2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : E15C7DEFDFEF7072
2017-12-07ATHC-PRPM2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : 0843BAC8F064E70B
2017-10-02kkmrkkblmbrbkC-PRPM2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : 0843BAC8F064E70B
2017-09-21Oliver KruseC-PRPM2131/known_factors : 0843BAC8F064E70B
2016-09-08kkmrkkblmbrbkNF-PM1B1=500000000, B2=50000000000, E=12
2009-10-25Carsten KossendeyFFactor: 56820189601559
2008-10-16-anonymous-F-ECMFactor: 75240946321572974052576429054198576888452431