is 2 2370677 - 1
has 713645 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-LE3A1B0F238B90659double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26825.142667.6471%30000001000000000.81157.8373%25.954170.1826%2.5356%
PrimeNet2590.032462.7119%100001700000.00182.4739%0.034263.6343%0.9225%
GPU722630.673265.0794%100001400000.00171.2716%0.674965.5234%0.4441%
Difference+5+24.4693+2.5677%+2990000+99860000+0.8099+6.5657%+25.2792+4.6592%+4.6592%

Known prime factors (1 factor, 76.8 bits, 0.00323757% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23706771272765876480837206412312476.75226843932692661995
32 × 5 × 17 × 35090108094983
2020-07-20173509010809498311,171187,272349,772

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.231%
2010-11-04T10:39:00Jocelyn LaroucheManual testing2000020000---0.002--0.260%
2010-12-29T07:50:00markrtiny1000002025000---0.020--2.408%
2014-09-10T00:51:00Jocelyn LaroucheManual testing127074127074---0.012--0.936%
2015-09-28T05:44:09mikrMSI3000000100000000---0.812--7.837%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00Stephen Woodv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-13T22:55:00Sturle Sundegigi.ifi260261--0.065--
2012-05-31T11:43:00Sebastian HornbostelManual testing261262--0.130--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.414--
2015-03-09T12:35:00VictordeHollanderManual testing263264--0.828--
2015-03-09T12:35:00VictordeHollanderManual testing264265--1.576--
2015-10-30T09:42:39ramgeisManual testing265266--3.152--
2017-06-16T21:40:02Gordon SpenceManual testing266267--6.304--
2019-04-08T13:40:34TJAOIManual testing267268--12.61--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.220 GHz-days
Estimated T-Level:3.500
DigitsB1CurvesCompleteFacMiss
201100070 / 1000.70049.484%
255000070 / 2800.25077.845%

New Calculation Method

Total ECM effort:6.220 GHz-days
Estimated T-Level:3.500
DigitsB1CompleteFacMiss
20110002.25810.455%
25500000.20481.540%
302500000.01398.751%


ECM Summary

B1B2factorcurvesGHz-days
500005000000696.131
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00Stephen Woodv4_computersE3A1B0F238B906590.160
2018-05-13T17:51:09kkmrkkblmbrbkoldE3A1B0F238B906590.160


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-20T18:12:21ATHec2-PRPCF
127276587648083720641231
DF830D9339C66F6Ano
2020-07-21T22:46:10pew10980xe_1
127276587648083720641231
DF830D9339C66F6Ano


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 100000, B2 = 2025000 (P-1 stage 2)
B1 = 127074 (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: 2020-07-21T22:46:10+00:00