is 2 15463649 - 1
has 4655023 decimal digits
takes 7.755 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB1665C2A6AD50454double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.921564.1791%18000027000000.23074.1398%2.152365.6620%1.4829%
PrimeNet2650.471863.0769%7000022000000.13534.2974%0.607164.6636%1.5867%
GPU722697.720565.2174%11000028000000.18663.1096%7.907166.2990%1.0816%
Difference-2-5.7989-1.0383%+70000-100000+0.0442+1.0302%-5.7548-0.6370%-0.6370%

Known prime factors (1 factor, 69.3 bits, 0.00044832% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
154636497404086204306939466172169.32723940294442492
22 × 107 × 55935267389
2016-12-141075593526738915.1382,216.24,139.2

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-20T00:00:00ANONYMOUSv4_computers1800002700000---0.231--4.140%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-01-14T00:00:00Net_Forcev4_computers21258--0.002--
2001-03-11T00:00:00cmortonv4_computers21265--0.472--
2016-03-16T02:28:39Mark RoseManual testing265266--0.483--
2014-02-23T00:22:00NesowaManual testing266267--0.966--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-05-11T00:00:00ANONYMOUSv4_computers7AD3DA8E04045F__7.755
2004-10-03T00:00:00Architects Cubedv4_computersB1665C2A6AD504547.755
2006-02-15T00:00:00ANONYMOUSv4_computersB1665C2A6AD504547.755


PRP results:
No PRP results for M15463649


P-1 factor-bounds graph:
B1 = 180000, B2 = 2700000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2016-12-14T21:11:39+00:00