is 2 1071379 - 1
has 322518 decimal digits
takes 0.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB15767415158FC72double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26727.734368.6567%300000100000000.03564.1008%27.769969.9420%1.2853%
PrimeNet2560.009062.5000%4500650000.00032.0163%0.009363.2561%0.7561%
GPU722600.143465.0000%4500200000.00020.6514%0.143665.2280%0.2280%
Difference+7+27.5909+3.6567%+295500+9980000+0.0354+3.4494%+27.6263+4.7141%+4.7141%

Known prime factors (1 factor, 58.6 bits, 0.00546500% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10713794222499295386338311858.551197059084385
5 × 39411816877
2007-09-265394118168770.052692.282172.36

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-17T00:00:00Jocelyn Larouchev4_computers10000145000---0.001--0.564%
2004-04-09T00:00:00ANONYMOUSv4_computers1000002000000---0.009--2.396%
unknown30000010000000---0.036--4.101%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-24T00:00:00ANONYMOUSv4_computers21257--0.018--
2003-04-03T00:00:00ANONYMOUSv4_computers21258--0.036--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.572 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.572 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002819.86
25000025000000447.716


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-03T00:00:00ANONYMOUSv4_computersB15767415158FC720.032


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T22:36:45Oliver KruseGTX-1
422249929538633831
DFADB81CDB38E1__no
2017-10-19T15:17:17kkmrkkblmbrbkc4.xlarge
422249929538633831
DFADB81CDB38E1__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 100000, B2 = 2000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 10000, B2 = 145000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
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106
100
101
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1010
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TF factor-bounds graph:
267
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257
250
260
270
280
290
2100
Last modified: 2021-03-12T16:30:24+00:00