is 2 1570007 - 1
has 472620 decimal digits
takes 0.070 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L69DEAA658E806790double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.926068.6567%100000002000000001.31819.7347%20.244171.7079%3.0512%
PrimeNet2570.012263.1579%70001100000.00082.4775%0.013064.0707%0.9128%
GPU722610.195765.5738%6500600000.00061.0519%0.196365.9359%0.3621%
Difference+6+18.7303+3.0829%+9993500+199940000+1.3175+8.6828%+20.0478+5.7720%+5.7720%

Known prime factors (1 factor, 80.5 bits, 0.00512453% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
157000716576586460519646694056572580.455527914412500060404
22 × 32 × 72 × 13 × 56711 × 405932927
2016-08-2656711405932927300,5881.43592.6753

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000300000---0.002--1.006%
2011-01-30T17:57:00James HeinrichWHS800001380000---0.010--2.219%
2013-11-24T17:35:00David Campeaui5-2500k95000027550000---0.155--5.965%
2015-04-10T15:58:00VictordeHollanderManual testing10000000200000000---1.318--9.735%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-29T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.024--
2016-02-23T16:28:39Mark RoseManual testing258260--0.073--
2010-05-03T13:20:00Architects Cubeda3_bu2260261--0.098--
2016-02-23T16:28:39Mark RoseManual testing261262--0.196--
2010-05-24T21:18:00GrunwalderGIMPManual testing21263--1.017--
2016-02-23T16:28:39Mark RoseManual testing262263--0.625--
2015-02-25T00:57:00snme2pm1Manual testing263264--1.251--
2015-02-25T00:57:00snme2pm1Manual testing264265--2.380--
2015-10-11T16:52:42ramgeisManual testing265266--4.760--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.046 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.046 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025013.99
50000500000010.056


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-07T00:00:00ANONYMOUSv4_computers4169A3E125364F__0.070
1999-03-01T00:00:00ANONYMOUSv4_computers69DEAA658E8067900.070
2015-07-04T19:28:00MadPooManual testing69DEAA658E8067900.070


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T22:12:07Oliver KruseGTX-2
1657658646051964669405657
60F2E685D69700__no
2017-10-31T06:56:44Chang Chia-Tchehomura
1657658646051964669405657
60F2E685D69700__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 950000, B2 = 27550000 (P-1 stage 2)
B1 = 950000 (P-1 stage 1)
B1 = 80000, B2 = 1380000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 20000, B2 = 300000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-08-19T13:18:40+00:00