is 2 2622637 - 1
has 789493 decimal digits
takes 0.203 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L11C6FA5B93FAF25Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.329867.1642%2000000600000000.57797.6848%11.907769.6875%2.5234%
PrimeNet2590.029362.7119%110002000000.00242.6992%0.031763.7183%1.0065%
GPU722630.608665.0794%130002000000.00261.5715%0.611265.6282%0.5488%
Difference+4+10.7212+2.0848%+1987000+59800000+0.5753+6.1132%+11.2965+4.0594%+4.0594%

Known prime factors (1 factor, 82.4 bits, 0.00314205% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
262263764007084941237170573627612582.4051220281055693890740
22 × 32 × 5 × 11 × 197 × 3128444484679
2010-06-131973128444484679480,17119,08935,652

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-31T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.295%
2003-11-08T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.915%
2019-07-04T12:42:52alpertronManual testing20000006000000012---0.578--7.685%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-26T00:00:00ANONYMOUSv4_computers21259--0.029--
2022-03-11T04:28:49LordJuliusManual testing21260--0.059--
2009-01-30T21:23:00Sturle Sundegimo.ifi260261--0.059--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.309 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.309 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.309


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computers11C6FA5B93FAF25F0.203


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-17T14:44:14Oliver KruseGTX-0
6400708494123717057362761
F2C104E63E142A__no
2017-12-02T17:46:12kkmrkkblmbrbkc4.xlarge
6400708494123717057362761
F2C104E63E142A__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (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: 2022-03-11T04:28:49+00:00