is 2 25015547 - 1
has 7530431 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-L25677E6AE8DC9E89double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27119.111264.7887%23500011162500.35172.3562%19.462965.6184%0.8296%
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%+55000-3883750-0.1983-1.3044%+9.3609+0.0253%+0.0253%

Known prime factors:
No known factors for M25015547

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-02-02T00:00:00556guyv4_computers2350001116250---0.352--2.356%
2005-04-26T00:00:00556guyv4_computers2350001116250---0.352--2.356%
2005-07-01T00:00:00556guyv4_computers2350001116250---0.352--2.356%


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--
2004-03-26T00:00:00ANONYMOUSv4_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 M25015547


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-03-06T00:00:00556guyv4_computers25677E6AE8DC9E8921.44
2005-04-26T00:00:00556guyv4_computers25677E6AE8DC9E8921.44
2005-07-01T00:00:00556guyv4_computers25677E6AE8DC9E8921.44
2011-03-28T13:28:00Dr. Nowakazm7425677E6AE8DC9E8921.44


PRP results:
No PRP results for M25015547


P-1 factor-bounds graph:
B1 = 235000, B2 = 1116250 (P-1 stage 2)
B1 = 235000 (P-1 stage 1)
104
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106
104
105
106
107
TF factor-bounds graph:
271
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267
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260
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2100
Last modified: 2021-05-29T18:50:20+00:00