is 2 25645721 - 1
has 7720132 decimal digits
takes 21.977 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.158662.6866%----1.158662.6866%0.0000%
PrimeNet2660.575962.1212%12000045000000.44565.1734%1.021564.0809%1.9596%
GPU722709.317464.2857%18000055000000.58383.7455%9.901265.6234%1.3377%
Difference-3-8.1587-1.5991%-180000-5500000-0.5838-3.7455%-8.7426-2.9368%-2.9368%

Known prime factors (1 factor, 54.4 bits, 0.00021197% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
25645721231207427644460391754.360450771939
33 × 2221 × 7517
2001-08-12222175170.00020.00310.0056

P-1 results:
No P-1 results for M25645721


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-12T00:00:00Net_Forcev4_computers??54.360176.39847e-545.350.000


ECM factoring results:
No ECM results for M25645721


Lucas-Lehmer results:
No L-L results for M25645721


PRP results:
No PRP results for M25645721


P-1 factor-bounds graph:
102
103
104
102
103
104
TF factor-bounds graph:
267
2
250
260
270
280
290
2100
Last modified: 2001-08-12T00:00:00+00:00