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
9923Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
21826829271031.0old
84886898891033.0old
13237116881291340.3old
91954449345143931653.0old
402995915911063361191937112192307334111.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000006152 / 16550
Estimated T-Level: 46.9
TF below 2^151 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse09F8B410FFD2D5C85013
Verified2017-10-02kkmrkkblmbrbk09F8B410FFD2D5C85013
Verified2017-12-07ATH09F8B410FFD2D5C85914513
Verified2020-04-17Oliver Kruse4F37077F1169D3975796853
Verified2024-07-01kkmrkkblmbrbk4F37077F1169D3975903253
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M9923/1323711688129/2182682927/4029959159110633611919371121923073/8488689889/9195444934514393 : 4F37077F1169D397
PRP: Verified
PRP without proof (small exponent)
2023-06-12JacobZNF-PM1
B1=58000000000, B2=241250667952694400
2022-11-24Kevin_9611NF-PM1
B1=1000000000, B2=100294988083290
2021-08-27Seth_TrNF-PM1
B1=400000000
2021-08-27Seth_TrNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M9923/2182682927/8488689889/1323711688129/9195444934514393/4029959159110633611919371121923073 : 4F37077F1169D397
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M9923/2182682927/8488689889/1323711688129/9195444934514393/4029959159110633611919371121923073 : 09F8B410FFD2D5C8
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M9923/2182682927/8488689889/1323711688129/9195444934514393/4029959159110633611919371121923073 : 09F8B410FFD2D5C8
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M9923/known_factors : 09F8B410FFD2D5C8
PRP without proof (not generated)