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:










MnStatusDetails
3923Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
219689617.7old
2236111721.1old
5765766158403131571832169.0old
1143678043531704667421073364973096.5old
169483958287680607266931698485229734110.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000013457 / 40830
Estimated T-Level: 51.6
TF below 2^167 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseBB444D3CDE70D25A5013
Verified2017-10-02kkmrkkblmbrbkBB444D3CDE70D25A5013
Verified2017-12-07ATHBB444D3CDE70D25A5369713
Verified2020-04-17Oliver Kruse86BDCAA25BCB45F55179953
Verified2024-02-03Wentao Huang86BDCAA25BCB45F5566453
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M3923/219689/2236111/576576615840313157183/114367804353170466742107336497/1694839582876806072669316984852297 : 86BDCAA25BCB45F5
PRP: Verified
PRP without proof (small exponent)
2023-05-15JacobZNF-PM1
B1=66000000000, B2=667136464473408930
2021-08-27Seth_TrNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M3923/219689/2236111/576576615840313157183/114367804353170466742107336497/1694839582876806072669316984852297 : 86BDCAA25BCB45F5
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M3923/219689/2236111/576576615840313157183/114367804353170466742107336497/1694839582876806072669316984852297 : BB444D3CDE70D25A
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M3923/219689/2236111/576576615840313157183/114367804353170466742107336497/1694839582876806072669316984852297 : BB444D3CDE70D25A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M3923/known_factors : BB444D3CDE70D25A
PRP without proof (not generated)