is 2 2366267 - 1
has 712318 decimal digits
takes 0.160 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2EB026C90E2EFDCBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.557367.1642%30000001000000000.81158.4947%13.368869.9535%2.7893%
PrimeNet2590.032562.7119%100001700000.00182.4730%0.034363.6340%0.9221%
GPU722630.674565.0794%100001400000.00171.2711%0.676265.5232%0.4439%
Difference+4+11.8828+2.0848%+2990000+99860000+0.8099+7.2235%+12.6927+4.4302%+4.4302%

Known prime factors (1 factor, 81.9 bits, 0.00346064% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
236626744745147361049376408723132581.888945479680886590068
22 × 3 × 41 × 1921706668468679
2017-10-17411921706668468679413,39210,255,93519,155,230

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.286%
2010-11-03T21:25:00Jocelyn LaroucheManual testing2000020000---0.002--0.310%
2010-12-30T15:41:00markrtiny1000002025000---0.020--2.711%
2014-09-10T00:51:00Jocelyn LaroucheManual testing127125127125---0.012--1.074%
2015-09-12T16:08:00mikrMSI3000000100000000---0.812--8.495%
2018-04-27T11:59:59alpertronManual testing20000006000000012---0.505--7.604%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-15T05:58:00Sturle Sunderodolfo.ifi260261--0.065--
2012-05-30T18:44:00Sebastian HornbostelManual testing261262--0.130--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.415--
2015-03-09T12:35:00VictordeHollanderManual testing263264--0.830--
2015-03-09T12:35:00VictordeHollanderManual testing264265--1.579--
2015-10-30T09:42:38ramgeisManual testing265266--3.158--
2017-06-16T21:40:01Gordon SpenceManual testing266267--6.316--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.487 GHz-days
Estimated T-Level:1.400
DigitsB1CurvesCompleteFacMiss
201100028 / 1000.28075.472%
255000028 / 2800.10090.468%

New Calculation Method

Total ECM effort:2.487 GHz-days
Estimated T-Level:1.400
DigitsB1CompleteFacMiss
20110000.90340.526%
25500000.08292.161%
302500000.00599.499%


ECM Summary

B1B2factorcurvesGHz-days
500005000000272.399
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers2EB026C90E2EFDCB0.160


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-18T04:51:34Oliver KruseGTX-2
4474514736104937640872313
DAC26BA588BE1D__no
2017-10-18T20:35:32YarBerManual testing
4474514736104937640872313
no
2017-11-30T17:29:41kkmrkkblmbrbkc4.xlarge
4474514736104937640872313
3E93A13479780A__no
2017-11-30T17:33:21kkmrkkblmbrbkc4.xlarge
4474514736104937640872313
DAC26BA588BE1D__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 100000, B2 = 2025000 (P-1 stage 2)
B1 = 127125 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-04-27T11:59:59+00:00