is 2 25860683 - 1
has 7784842 decimal digits
takes 22.161 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE5EFA63C3B707654double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.486764.7887%3850003850000.47841.6577%18.965165.3724%0.5837%
PrimeNet2660.571162.1212%12000045000000.44565.1792%1.016764.0830%1.9618%
GPU722709.239964.2857%19000055000000.59563.7812%9.835565.6361%1.3504%
Difference+1+9.2468+0.5030%+195000-5115000-0.1172-2.1235%+9.1296-0.2637%-0.7667%

Known prime factors (1 factor, 67.3 bits, 0.00026018% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
258606831795836236049833587992167.2833472136130453
3 × 43 × 20389 × 1320113
2011-10-262038913201132.28310.11330.1669

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-02-02T00:00:00ANONYMOUSv4_computers385000385000---0.478--1.658%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-10-26T06:15:00Carsten KossendeyManual testing??67.283211.13445.212.314
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2004-04-29T00:00:001997rj7v4_computers21262--0.024--
2004-09-16T00:00:00monstv4_computers21267--1.149--
2011-10-26T06:14:00Carsten KossendeyManual testing267271--17.34--


ECM factoring results:
No ECM results for M25860683


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-05-28T00:00:00ANONYMOUSv4_computersE5EFA63C3B70765422.16


PRP results:
No PRP results for M25860683


P-1 factor-bounds graph:
B1 = 385000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
271
267
262
256
2
250
260
270
280
290
2100
Last modified: 2011-10-26T06:15:03+00:00