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

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MnStatusDetails
2131Composite, with 4 known prime factors. Cofactor is composite.
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
6026000000060701 / 105362
Estimated T-Level: 57.9
TF below 2^187 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse0843BAC8F064E70B4013
Verified2017-10-02kkmrkkblmbrbk0843BAC8F064E70B4013
Verified2017-12-07ATH0843BAC8F064E70B416913
Verified2020-04-17Oliver KruseE15C7DEFDFEF7072480853
Verified2024-01-27Wentao HuangE15C7DEFDFEF70724143253
History
DateUserTypeResult
2024-04-25masserNF-PM1
B1=100000000000, B2=192252280032302490
2024-01-27Wentao HuangC-PRP
M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : E15C7DEFDFEF7072
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : E15C7DEFDFEF7072
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : 0843BAC8F064E70B
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : 0843BAC8F064E70B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M2131/known_factors : 0843BAC8F064E70B
PRP without proof (not generated)
2016-09-08kkmrkkblmbrbkNF-PM1
B1=500000000, B2=50000000000, E=12
2008-10-16-Anonymous-F-ECM
Factor: 75240946321572974052576429054198576888452431