is 2 1514719 - 1
has 455976 decimal digits
takes 0.068 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L17D911D7DB77757Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.616868.6567%100000002000000001.31819.7044%20.934971.6984%3.0417%
PrimeNet2570.012763.1579%65001100000.00082.4094%0.013564.0456%0.8877%
GPU722610.202865.5738%6000500000.00050.9500%0.203365.9008%0.3271%
Difference+6+19.4140+3.0829%+9994000+199950000+1.3176+8.7543%+20.7316+5.7975%+5.7975%

Known prime factors (1 factor, 72.4 bits, 0.00477723% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151471960675663704589635091292272.3622002868641133756
22 × 11 × 29 × 1569646270481
2015-05-192915696462704811,106.55,538.810,345

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T19:10:00James HeinrichWHS800001320000---0.010--2.182%
2013-11-18T06:18:00David Campeaui5-2500k94500027405000---0.155--5.933%
2015-02-24T22:28:00VictordeHollanderManual testing10000000200000000---1.318--9.704%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-04-04T04:54:00GrunwalderGIMPManual testing21263--1.054--
2015-01-26T20:14:00snme2pm1Manual testing263264--1.296--
2015-01-26T20:14:00snme2pm1Manual testing264265--2.467--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.998 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:13.998 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025013.94
50000500000010.056


Lucas-Lehmer results:
No L-L results for M1514719


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T12:22:20Oliver KruseGTX-1
6067566370458963509129
E3A8C611A2EB07__no
2017-10-29T16:22:04kkmrkkblmbrbkc4.xlarge
6067566370458963509129
E3A8C611A2EB07__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 945000, B2 = 27405000 (P-1 stage 2)
B1 = 945000 (P-1 stage 1)
B1 = 80000, B2 = 1320000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-06-07T09:12:46+00:00