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
662617Factored
FactorDigitsBitsDate
5283023742389277371858.92014-04-03 12:52:38
192276698197717464072064.12007-11-24 03:38:18
ECM
DigitsB1Curves
2550000280 / 280
30250000215 / 640
Estimated T-Level: 26.7 ⓘ
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-27Oliver KruseD656CF7ED515B1992013
Verified2017-09-28Oliver KruseD656CF7ED515B1992013
Verified2017-11-09kkmrkkblmbrbkD656CF7ED515B199229626613
Unverified (Reliable)2020-04-19Oliver Kruse2546EDBCD2C5C7__212041453
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-19Oliver KruseC-PRP
M662617/528302374238927737/19227669819771746407 : 2546EDBCD2C5C7__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M662617/528302374238927737/19227669819771746407 : D656CF7ED515B199
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M662617/19227669819771746407/528302374238927737 : D656CF7ED515B199
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M662617/19227669819771746407/528302374238927737 : D656CF7ED515B199
PRP: Unverified (Reliable)
PRP without proof (not generated)
2014-04-03Richard B. WoodsF-ECM
Factor: 528302374238927737
2007-11-24James HeinrichF-ECM
Factor: 19227669819771746407