is 2 2376809 - 1
has 715491 decimal digits
takes 0.161 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBF603429255922E7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.501667.1642%2000000600000000.50557.6077%13.007169.6622%2.4980%
PrimeNet2590.032362.7119%100001700000.00182.4751%0.034163.6348%0.9229%
GPU722630.671565.0794%100001400000.00171.2723%0.673265.5237%0.4443%
Difference+4+11.8301+2.0848%+1990000+59860000+0.5038+6.3354%+12.3339+4.1386%+4.1386%

Known prime factors (1 factor, 67.0 bits, 0.00282034% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23768091511149979597758382812167.03431789470243460
22 × 5 × 691 × 2300251103
2015-06-21691230025110312.93712.27622.928

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.287%
2010-11-07T17:04:00Jocelyn LaroucheManual testing1500015000---0.001--0.243%
2010-11-15T22:51:00Jocelyn LaroucheManual testing2000020000---0.002--0.310%
2010-12-28T21:44:00markrtiny1000002025000---0.020--2.713%
2014-09-10T00:51:00Jocelyn LaroucheManual testing127004127004---0.012--1.074%
2018-09-28T16:24:33alpertronManual testing20000006000000012---0.505--7.608%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.032--
2022-03-09T16:37:54LordJuliusManual testing21260--0.065--
2009-01-15T06:59:00Sturle Sundegolli.ifi260261--0.065--
2012-05-31T17:43:00Sebastian HornbostelManual testing261262--0.129--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.413--
2015-03-09T12:35:00VictordeHollanderManual testing263264--0.826--
2015-03-09T12:35:00VictordeHollanderManual testing264265--1.572--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.156 GHz-days
Estimated T-Level:0.650
DigitsB1CurvesCompleteFacMiss
201100013 / 1000.13087.752%
255000013 / 2800.04695.455%

New Calculation Method

Total ECM effort:1.156 GHz-days
Estimated T-Level:0.650
DigitsB1CompleteFacMiss
20110000.41965.747%
25500000.03896.281%
302500000.00299.767%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.067
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00ANONYMOUSv4_computersBF603429255922E70.161


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:24:43alpertronManual testing
151114997959775838281
F3BCEC7B3FF23C__no
2017-11-02T04:00:57Oliver KruseGTX-2
151114997959775838281
F3BCEC7B3FF23C__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 100000, B2 = 2025000 (P-1 stage 2)
B1 = 127004 (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)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-09T16:37:54+00:00