is 2 1595653 - 1
has 480340 decimal digits
takes 0.071 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L717187AA2F502B9Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.621868.6567%100000002000000001.31819.7485%19.939971.7122%3.0555%
PrimeNet2570.012063.1579%70001200000.00092.5468%0.012964.0962%0.9383%
GPU722610.192565.5738%6500600000.00061.0557%0.193165.9372%0.3634%
Difference+6+18.4293+3.0829%+9993500+199940000+1.3175+8.6928%+19.7468+5.7750%+5.7750%

Known prime factors (1 factor, 81.0 bits, 0.00507906% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
159565324930387542192159391226812581.044781197025361784780
22 × 3 × 5 × 7 × 6762121 × 275060579
2017-01-026762121275060579474,3271.38471.8128

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-04T14:44:00James HeinrichWHS850001445000---0.010--2.278%
2013-12-05T22:06:00David Campeaui5-2500k98000028420000---0.160--6.028%
2015-04-21T09:17:00VictordeHollanderManual testing10000000200000000---1.318--9.748%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-29T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.024--
2016-02-23T16:28:40Mark RoseManual testing258260--0.072--
2010-05-02T18:30:00Architects Cubedm1_76l260261--0.096--
2016-02-23T16:28:40Mark RoseManual testing261262--0.193--
2010-07-04T17:55:00GrunwalderGIMPManual testing21263--1.000--
2016-02-23T16:28:40Mark RoseManual testing262263--0.615--
2015-03-04T21:28:00snme2pm1Manual testing263264--1.230--
2015-03-04T21:28:00snme2pm1Manual testing264265--2.342--
2015-10-11T16:52:59ramgeisManual testing265266--4.683--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.069 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.069 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024813.90
50000500000030.168


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-26T00:00:00ANONYMOUSv4_computers717187AA2F502B9E0.071
2015-07-10T01:00:00MadPooManual testing717187AA2F502B9E0.071


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T02:47:01Oliver KruseGTX-1
2493038754219215939122681
4000195EE781B1__no
2017-10-31T21:15:34kkmrkkblmbrbkc4.xlarge
2493038754219215939122681
4000195EE781B1__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 980000, B2 = 28420000 (P-1 stage 2)
B1 = 980000 (P-1 stage 1)
B1 = 85000, B2 = 1445000 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
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109
TF factor-bounds graph:
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Last modified: 2019-09-02T12:32:18+00:00