is 2 25252639 - 1
has 7601802 decimal digits
takes 21.640 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7E4FDBB5384421B8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27237.870665.2778%27000034425000.55032.8924%38.420966.2821%1.0043%
PrimeNet2660.584862.1212%11000040000000.40004.9842%0.984964.0092%1.8880%
GPU722709.462464.2857%18000055000000.58383.7377%10.046265.6206%1.3349%
Difference+2+28.4082+0.9921%+90000-2057500-0.0336-0.8452%+28.3747+0.6615%+0.6615%

Known prime factors:
No known factors for M25252639

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-08-06T00:00:00ANONYMOUSv4_computers2700003442500---0.550--2.892%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2004-01-07T00:00:00markrv4_computers21262--0.024--
2004-04-20T00:00:00ANONYMOUSv4_computers21267--1.177--
2016-01-04T21:26:21VictordeHollanderManual testing267268--1.184--
2017-06-17T22:10:10ramgeisManual testing268269--2.367--
2017-06-17T22:10:10ramgeisManual testing269270--4.735--
2021-01-08T16:04:38-Anonymous-Manual testing270271--9.469--
2021-01-08T16:04:38-Anonymous-Manual testing271272--18.94--


ECM factoring results:
No ECM results for M25252639


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-08-20T00:00:00ANONYMOUSv4_computers7E4FDBB5384421B821.64
2010-12-26T11:05:00ANONYMOUS7E4FDBB5384421B821.64


PRP results:
No PRP results for M25252639


P-1 factor-bounds graph:
B1 = 270000, B2 = 3442500 (P-1 stage 2)
B1 = 270000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2021-01-08T16:04:38+00:00