is 2 26494631 - 1
has 7975679 decimal digits
takes 24.526 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L37D7C1CD70447056double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275288.809866.6667%60000015408120012.02944.9250%300.839268.3083%1.6417%
PrimeNet2660.557462.1212%12000045000000.48145.1958%1.038864.0893%1.9681%
GPU722709.018864.2857%19000055000000.64333.7935%9.662265.6406%1.3548%
Difference+5+279.7909+2.3810%+410000+148581200+11.3861+1.1315%+291.1770+2.6678%+2.6678%

Known prime factors:
No known factors for M26494631

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-11-22T00:00:00ANONYMOUSv4_computers2800003010000---0.575--2.037%
2021-12-21T02:48:23Sid & AndyMagic_8_Ball600000154081200---12.03--4.925%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2004-06-04T00:00:00markrv4_computers21262--0.023--
2004-08-06T00:00:00ANONYMOUSv4_computers21267--1.122--
2011-10-23T15:14:00ANONYMOUSManual testing267268--1.128--
2011-12-25T14:05:00bcp19Manual testing268269--2.256--
2017-04-15T20:18:31ramgeisManual testing269270--4.513--
2021-04-30T18:46:12mikrManual testing270271--9.026--
2021-08-25T16:21:19TheJudgerManual testing271272--18.05--
2021-08-25T16:21:19TheJudgerManual testing272273--36.10--
2021-09-30T20:12:59TheJudgerManual testing273274--72.20--
2021-10-17T20:52:29TheJudgerManual testing274275--144.4--


ECM factoring results:
No ECM results for M26494631


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-03-06T00:00:00ANONYMOUSv4_computers37D7C1CD7044705624.53
2012-08-06T01:29:00monstpoincare37D7C1CD7044705624.53


PRP results:
No PRP results for M26494631


P-1 factor-bounds graph:
B1 = 600000, B2 = 154081200 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 280000, B2 = 3010000 (P-1 stage 2)
B1 = 280000 (P-1 stage 1)
104
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106
104
105
106
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108
109
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
262
250
260
270
280
290
2100
Last modified: 2021-12-21T02:48:23+00:00