is 2 25331177 - 1
has 7625445 decimal digits
takes 21.707 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5255413B46D72A4Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275302.074766.6667%25000018750000.42071.7498%302.495467.2499%0.5833%
PrimeNet2660.583062.1212%11000040000000.40004.9863%0.983064.0100%1.8888%
GPU722709.433164.2857%18000055000000.58383.7392%10.016965.6212%1.3354%
Difference+5+292.6417+2.3810%+70000-3625000-0.1632-1.9895%+292.4785+1.6288%+1.6288%

Known prime factors (1 factor, 76.6 bits, 0.00030244% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
253311771154801059174934766280092476.6122279406636286452
22 × 32 × 79 × 37199 × 21545717
2021-12-253719921545717762.651.50232.7243

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-08-06T00:00:00Bobbi and the Straysv4_computers2500001875000---0.421--1.750%
2007-02-20T00:00:00Bobbi and the Straysv4_computers2500001875000---0.421--1.750%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-12-25T01:41:12Anton RepkolynxP1200000012000000027P-12476.61211.61


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2004-02-07T00:00:00markrv4_computers21262--0.024--
2004-05-11T00:00:00ANONYMOUSv4_computers21267--1.173--
2016-01-15T21:25:28VictordeHollanderManual testing267268--1.180--
2017-05-29T00:27:39ramgeisManual testing268269--2.360--
2017-05-29T00:27:39ramgeisManual testing269270--4.720--
2021-06-11T18:55:21mikrManual testing270271--9.440--
2021-08-28T19:52:40TheJudgerManual testing271272--18.88--
2021-08-28T19:52:40TheJudgerManual testing272273--37.76--
2021-10-01T19:52:57TheJudgerManual testing273274--75.52--
2021-10-17T20:42:41TheJudgerManual testing274275--151.0--


ECM factoring results:
No ECM results for M25331177


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-09-02T00:00:00Bobbi and the Straysv4_computers5255413B46D72A4C21.71
2007-02-20T00:00:00Bobbi and the Straysv4_computers5255413B46D72A4C21.71
2011-01-24T07:50:00lexatrefscc_ya5255413B46D72A4C21.71


PRP results:
No PRP results for M25331177


P-1 factor-bounds graph:
B1 = 2000000, B2 = 120000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 250000, B2 = 1875000 (P-1 stage 2)
B1 = 250000 (P-1 stage 1)
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TF factor-bounds graph:
275
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258
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2100
Last modified: 2021-12-25T01:41:12+00:00