is 2 1445057 - 1
has 435006 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFBD2A2FB64E25BCAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.562568.6567%2500000625000000.31947.4043%20.881870.9775%2.3207%
PrimeNet2560.006662.5000%70001200000.00072.9023%0.007463.5883%1.0883%
GPU722600.106365.0000%6000900000.00061.3561%0.106965.4746%0.4746%
Difference+7+20.4562+3.6567%+2494000+62410000+0.3188+6.0481%+20.7750+5.5028%+5.5028%

Known prime factors (1 factor, 89.5 bits, 0.00619103% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14450578537658110620216283238898392789.464295409043055748537367
3 × 98469681018582845789
2017-11-21398469681018582845789145,856,6072.970e+115.547e+11

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.838%
2010-06-18T13:02:00Rob_Deetwopc100000200000---0.006--1.215%
2010-06-19T12:42:00Rob_Deetwopc200000300000---0.011--1.518%
2010-06-20T19:32:00Rob_Deetwopc2000001000000---0.013--2.332%
2010-06-21T12:49:00Rob_Deetwopc2000002000000---0.017--2.818%
2010-06-22T12:51:00Rob_Deetwopc2000003000000---0.020--3.109%
2010-06-23T12:41:00Rob_Deetwopc2000004000000---0.023--3.319%
2010-06-24T12:47:00Rob_Deetwopc2000005000000---0.026--3.483%
2014-11-17T02:17:00Jocelyn LaroucheManual testing244416244416---0.014--1.386%
2015-01-27T21:58:00Jocelyn LaroucheManual testing325316325316---0.018--1.589%
2015-01-30T21:42:00Jocelyn LaroucheManual testing357847357847---0.020--1.660%
2015-02-13T18:00:00Jocelyn LaroucheManual testing393631393631---0.022--1.734%
2015-03-02T13:10:00Jocelyn LaroucheManual testing476293476293---0.026--1.886%
2015-03-03T20:46:00Jocelyn LaroucheManual testing523922523922---0.029--1.964%
2015-03-10T07:55:00Jocelyn LaroucheManual testing576314576314---0.032--2.045%
2015-04-08T16:59:00Jocelyn LaroucheManual testing767072767072---0.042--2.298%
2015-05-01T17:21:00Jocelyn LaroucheManual testing928156928156---0.051--2.476%
2015-05-07T16:19:00Jocelyn LaroucheManual testing10209711020971---0.057--2.567%
2015-05-11T00:42:00alpertronManual testing200000060000000---0.286--7.226%
2016-08-20T18:31:44Bruno Victal5820K-factoring25000006250000012---0.319--7.404%
2016-08-27T10:53:51Bruno VictalManual testing25000006250000012---0.319--7.404%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--
2016-02-23T16:28:32Mark RoseManual testing258260--0.080--
2010-05-12T07:20:00Architects Cubeda3_bu2260261--0.106--
2016-02-23T16:28:32Mark RoseManual testing261262--0.213--
2011-05-07T23:53:00GrunwalderGIMPManual testing21263--1.104--
2016-02-23T16:28:32Mark RoseManual testing262263--0.679--
2015-03-23T20:56:00snme2pm1Manual testing263264--1.359--
2015-03-23T20:56:00snme2pm1Manual testing264265--2.586--
2015-09-16T10:09:00ramgeisManual testing265266--5.171--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.875 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:11.875 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024911.78
50000500000020.095


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersFBD2A2FB64E25BCA0.055
2015-06-27T00:55:00MadPooManual testingFBD2A2FB64E25BCA0.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-22T11:43:28Oliver KruseGTX-0
853765811062021628323889839
D2BC1CCCC7FC0C__no
2017-11-22T15:07:18kkmrkkblmbrbkc4.xlarge
853765811062021628323889839
D2BC1CCCC7FC0C__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 1020971 (P-1 stage 1)
B1 = 928156 (P-1 stage 1)
B1 = 767072 (P-1 stage 1)
B1 = 576314 (P-1 stage 1)
B1 = 523922 (P-1 stage 1)
B1 = 476293 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 393631 (P-1 stage 1)
B1 = 357847 (P-1 stage 1)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 325316 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 244416 (P-1 stage 1)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-03-01T14:45:47+00:00