is 2 2362649 - 1
has 711229 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-L5542B44B8B90C959double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.576567.1642%30000001000000000.81158.4934%13.388169.9531%2.7889%
PrimeNet2590.032562.7119%100001700000.00182.4723%0.034363.6337%0.9219%
GPU722630.675565.0794%100001400000.00171.2707%0.677265.5231%0.4437%
Difference+4+11.9010+2.0848%+2990000+99860000+0.8099+7.2227%+12.7109+4.4299%+4.4299%

Known prime factors (1 factor, 88.4 bits, 0.00373982% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23626493968558400355773700163549772788.35983985357121514319312
24 × 32 × 131 × 3079 × 165901 × 8715877
2015-08-29165901871587726,945,5210.06190.0869

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.286%
2010-11-03T21:25:00Jocelyn LaroucheManual testing2000020000---0.002--0.310%
2010-12-23T18:46:00Oscar Östlin7501175011---0.007--0.791%
2011-01-23T02:06:00Oscar Östlin900001822500---0.018--2.591%
2014-08-07T10:52:00Jocelyn LaroucheManual testing117166117166---0.011--1.026%
2014-10-22T23:53:00Jocelyn LaroucheManual testing144332144332---0.014--1.150%
2015-08-29T08:40:00mikrMSI3000000100000000122788.3590.8120.3191.6238.493%
2018-04-27T11:59:31alpertronManual testing20000006000000012-
skipped known factor: 396855840035577370016354977
--0.505--7.603%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.033--
2022-03-09T16:37:20LordJuliusManual testing21260--0.065--
2009-01-14T17:31:00Sturle Sundeginjtje.ifi260261--0.065--
2012-05-30T14:43:00Sebastian HornbostelManual testing261262--0.130--
2013-01-23T08:26:00dbaughManual testing262263--0.415--
2015-03-09T12:35:00VictordeHollanderManual testing263264--0.831--
2015-03-09T12:35:00VictordeHollanderManual testing264265--1.581--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.332 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.332 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.332


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers5542B44B8B90C9590.160


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:25:04alpertronManual testing
396855840035577370016354977
AAF21698374580__no
2017-11-01T12:54:14Oliver KruseGTX-2
396855840035577370016354977
AAF21698374580__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 90000, B2 = 1822500 (P-1 stage 2)
B1 = 144332 (P-1 stage 1)
B1 = 117166 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
267
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-09T16:37:20+00:00