is 2 2616767 - 1
has 787726 decimal digits
takes 0.202 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAD9D125E6EB66763double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.355267.1642%2000000600000000.57797.6830%11.933169.6870%2.5228%
PrimeNet2590.029362.7119%110002000000.00242.6981%0.031763.7179%1.0061%
GPU722630.609965.0794%120002000000.00251.5323%0.612465.6144%0.5351%
Difference+4+10.7453+2.0848%+1988000+59800000+0.5754+6.1507%+11.3207+4.0725%+4.0725%

Known prime factors (1 factor, 63.7 bits, 0.00243532% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2616767152623227135165308892063.7272916255576732
22 × 3 × 243021298061
2010-06-1242430212980611.21601,482.82,769.5

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--0.914%
2019-07-04T12:46:25alpertronManual testing20000006000000012---0.578--7.683%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-26T00:00:00ANONYMOUSv4_computers21259--0.029--
2022-03-11T04:28:48LordJuliusManual testing21260--0.059--
2009-01-31T22:41:00Sturle Sundegonsha.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)
1999-04-23T00:00:00ANONYMOUSv4_computersAD9D125E6EB667630.202


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-17T12:53:03Oliver KruseGTX-3
15262322713516530889
DFA0236CAD490E__no
2017-12-02T15:30:41kkmrkkblmbrbkc4.xlarge
15262322713516530889
DFA0236CAD490E__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: 2022-03-11T04:28:48+00:00