is 2 2393263 - 1
has 720444 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-LF57036BF2E0174BEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.415767.1642%2000000600000000.50557.6131%12.921169.6640%2.4998%
PrimeNet2590.032162.7119%100001700000.00182.4783%0.033963.6360%0.9241%
GPU722630.666965.0794%100001400000.00171.2741%0.668665.5243%0.4449%
Difference+4+11.7488+2.0848%+1990000+59860000+0.5038+6.3390%+12.2525+4.1397%+4.1397%

Known prime factors (1 factor, 68.5 bits, 0.00286246% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23932634192026769521447545832168.50687579734645157
3 × 29 × 1006663616611
2015-08-1029100666361661139.8125,372.510,034

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%
2010-12-24T12:17:00markrtiny1000002075000---0.020--2.731%
2014-09-16T20:51:00ANONYMOUSManual testing126819126819---0.012--1.075%
2018-09-28T16:25:18alpertronManual testing20000006000000012---0.505--7.613%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.032--
2022-03-09T16:37:57LordJuliusManual testing21260--0.064--
2009-01-14T19:11:00Sturle 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:1.246 GHz-days
Estimated T-Level:0.700
DigitsB1CurvesCompleteFacMiss
201100014 / 1000.14086.875%
255000014 / 2800.05095.114%

New Calculation Method

Total ECM effort:1.246 GHz-days
Estimated T-Level:0.700
DigitsB1CompleteFacMiss
20110000.45263.660%
25500000.04196.001%
302500000.00399.749%


ECM Summary

B1B2factorcurvesGHz-days
500005000000131.157
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computersF57036BF2E0174BE0.162


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-12T20:14:30Oliver KruseGTX-09A5958243C334D__no
2017-11-26T10:56:04kkmrkkblmbrbkold
419202676952144754583
9A5958243C334D__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 = 126819 (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