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:





MnDetails
2153
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
660747179287211445.9old
2822810489953902945913212477.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000060087 / 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 Kruse249316A42BFCE95F2013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbk249316A42BFCE95F2134513
Verified
No proof (small exponent)
2020-04-17Oliver KruseB5CE3988B0BBB0F22142253
Verified
No proof (small exponent)
2024-01-27Wentao HuangB5CE3988B0BBB0F2277653
History
DateUserTypeResult
2025-04-01masserNF-PP1Start=176/19, B1=5300000000, B2=5294700000000
2024-04-29masserNF-PM1B1=100000000000, B2=275604102122349000
2024-01-27Wentao HuangC-PRPM2153/66074717928721/282281048995390294591321 : B5CE3988B0BBB0F2
2020-04-17Oliver KruseC-PRPM2153/66074717928721/282281048995390294591321 : B5CE3988B0BBB0F2
2017-10-12kkmrkkblmbrbkC-PRPM2153/66074717928721/282281048995390294591321 : 249316A42BFCE95F
2017-09-21Oliver KruseC-PRPM2153/66074717928721/282281048995390294591321 : 249316A42BFCE95F
2017-09-21Oliver KruseC-PRPM2153/66074717928721/282281048995390294591321 : 249316A42BFCE95F
2016-09-08kkmrkkblmbrbkNF-PM1B1=500000000, B2=50000000000, E=12
2009-10-25Carsten KossendeyF-PM1Factor: 66074717928721
1999-05-02-anonymous-F-PM1Factor: 66074717928721
1999-03-26-anonymous-F-PM1Factor: 66074717928721
1999-03-15-anonymous-F-PM1Factor: 66074717928721