is 2 25015499 - 1
has 7530416 decimal digits
takes 21.437 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3FBE094C8D8F9CCEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27119.111364.7887%29500074487500.85093.8482%19.962166.1437%1.3550%
PrimeNet2660.590462.1212%11000040000000.40004.9779%0.990464.0068%1.8856%
GPU722709.552164.2857%18000050000000.55003.6606%10.102165.5931%1.3073%
Difference+1+9.5592+0.5030%+115000+2448750+0.3009+0.1876%+9.8601+0.5507%+0.5507%

Known prime factors:
No known factors for M25015499

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-07-26T00:00:00ANONYMOUSv4_computers2950007448750---0.851--3.848%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2001-12-01T00:00:00Mattv4_computers21260--0.006--
2003-11-08T00:00:00markrv4_computers21262--0.025--
2004-03-26T00:00:00Team Prime Ribv4_computers21267--1.188--
2015-12-18T11:19:22VictordeHollanderManual testing267268--1.195--
2017-04-26T20:46:46ramgeisManual testing268269--2.390--
2017-04-26T20:46:46ramgeisManual testing269270--4.780--
2021-05-29T18:50:20mikrManual testing270271--9.56--


ECM factoring results:
No ECM results for M25015499


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-03-20T00:00:00curtiscv4_computers3FBE094C8D8F9CCE21.44
2010-09-08T22:01:00Eugene ChertokSolomon3FBE094C8D8F9CCE21.44


PRP results:
No PRP results for M25015499


P-1 factor-bounds graph:
B1 = 295000, B2 = 7448750 (P-1 stage 2)
B1 = 295000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-05-29T18:50:20+00:00