is 2 25331353 - 1
has 7625498 decimal digits
takes 21.708 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5C173FD8C4A44B5Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275302.072666.6667%26500027825000.49971.9654%302.572367.3218%0.6551%
PrimeNet2660.583062.1212%11000040000000.40004.9863%0.983064.0100%1.8888%
GPU722709.433064.2857%18000055000000.58383.7392%10.016865.6212%1.3354%
Difference+5+292.6396+2.3810%+85000-2717500-0.0841-1.7739%+292.5555+1.7006%+1.7006%

Known prime factors (1 factor, 79.2 bits, 0.00031262% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
253313536893815633518013231908492479.19013607278761458208
25 × 3 × 433 × 23767 × 13773293
2021-12-2523767137732935,134.60.96041.7415

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-08-06T00:00:00ANONYMOUSv4_computers2650002782500---0.500--1.965%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-12-25T01:41:16Anton RepkolynxP1200000012000000027P-12479.19011.61


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--
2004-06-04T00:00:00ANONYMOUSv4_computers21267--1.173--
2016-01-15T21:25:29VictordeHollanderManual testing267268--1.180--
2017-05-29T00:27:39ramgeisManual testing268269--2.360--
2017-05-29T00:27:39ramgeisManual testing269270--4.720--
2021-06-11T18:55:22mikrManual testing270271--9.440--
2021-08-28T19:51:12TheJudgerManual testing271272--18.88--
2021-08-28T19:51:12TheJudgerManual testing272273--37.76--
2021-10-01T19:52:27TheJudgerManual testing273274--75.52--
2021-10-17T20:41:57TheJudgerManual testing274275--151.0--


ECM factoring results:
No ECM results for M25331353


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-09-02T00:00:00ANONYMOUSv4_computers5C173FD8C4A44B5A21.71
2010-09-30T08:01:00Ilya S. Sapytskyctp065C173FD8C4A44B5A21.71


PRP results:
No PRP results for M25331353


P-1 factor-bounds graph:
B1 = 2000000, B2 = 120000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 265000, B2 = 2782500 (P-1 stage 2)
B1 = 265000 (P-1 stage 1)
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TF factor-bounds graph:
275
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258
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260
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2100
Last modified: 2021-12-25T01:41:16+00:00