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
12853Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
147813310638931691753.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001404 / 9201
Estimated T-Level: 40.8
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseEF13FA8DABE5E61B1013
Verified2017-10-12kkmrkkblmbrbkEF13FA8DABE5E61B1775313
Verified2020-04-17Oliver KruseBCD7EF6B5B2D93331481453
Verified2024-07-01kkmrkkblmbrbkBCD7EF6B5B2D93331887853
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M12853/14781331063893169 : BCD7EF6B5B2D9333
PRP: Verified
PRP without proof (small exponent)
2023-05-27-Anonymous-NF-PM1
B1=100000000000, B2=120417199046794650
2023-05-15JacobZNF-PM1
B1=8600000000, B2=36024966470342850
2022-02-05JossNF-PM1
B1=1000000, B2=3910366209750
2020-04-17Oliver KruseC-PRP
M12853/14781331063893169 : BCD7EF6B5B2D9333
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12853/14781331063893169 : EF13FA8DABE5E61B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12853/14781331063893169 : EF13FA8DABE5E61B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12853/14781331063893169 : EF13FA8DABE5E61B
PRP without proof (not generated)