is 2 2393707 - 1
has 720578 decimal digits
takes 0.162 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7A337975F2EDCF8Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.413367.1642%2000000600000000.50557.6132%12.918869.6640%2.4999%
PrimeNet2590.032162.7119%100001700000.00182.4784%0.033963.6360%0.9242%
GPU722630.666865.0794%100001400000.00171.2741%0.668465.5243%0.4449%
Difference+4+11.7466+2.0848%+1990000+59860000+0.5038+6.3391%+12.2504+4.1397%+4.1397%

Known prime factors (1 factor, 74.9 bits, 0.00312877% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2393707350919840279114774916092374.8947330050007772772
22 × 3 × 7 × 47 × 1856648938139
2015-03-224718566489381392,121.49,908.718,507

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.287%
2010-11-08T11:37:00Jocelyn LaroucheManual testing1500015000---0.001--0.243%
2010-11-15T22:51:00Jocelyn LaroucheManual testing2000020000---0.002--0.311%
2010-12-24T10:44:00markrtiny1000002075000---0.020--2.731%
2014-09-16T20:52:00ANONYMOUSManual testing126814126814---0.012--1.075%
2018-09-28T16:25:20alpertronManual testing20000006000000012---0.505--7.613%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-09T00:00:00ANONYMOUSv4_computers21259--0.032--
2022-03-09T16:37:57LordJuliusManual testing21260--0.064--
2009-01-14T21:27:00Sturle Sundefungo.ifi260261--0.064--
2012-06-02T08:43:00Sebastian HornbostelManual testing261262--0.128--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.410--
2015-03-10T10:44:00VictordeHollanderManual testing263264--0.820--
2015-03-10T10:44:00VictordeHollanderManual testing264265--1.561--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.068 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

New Calculation Method

Total ECM effort:1.068 GHz-days
Estimated T-Level:0.600
DigitsB1CompleteFacMiss
20110000.38767.903%
25500000.03596.562%
302500000.00299.785%


ECM Summary

B1B2factorcurvesGHz-days
500005000000110.979
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23T00:00:00ANONYMOUSv4_computers7A337975F2EDCF8D0.162


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:24:22alpertronManual testing
35091984027911477491609
F58487D4939522__no
2017-11-02T23:09:01Oliver KruseGTX-1
35091984027911477491609
F58487D4939522__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 100000, B2 = 2075000 (P-1 stage 2)
B1 = 126814 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
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: 2022-03-09T16:37:57+00:00