is 2 69255149 - 1
has 20847878 decimal digits
takes 185.161 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27455.243163.5135%750000161250006.15504.2642%61.398065.0694%
Target27455.243163.5135%450000150000004.81773.9447%60.060864.9528%
Difference---+300000+1125000+1.3373+0.3195%+1.3373+0.1166%

Known prime factors (1 factor, 73.5 bits, 0.00010613% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
69255149133781863230145629349672373.50296586221502567
28537 × 3384596191		2014-05-2328537338459619136.989714.981,335.2

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-12-08Brucebfc-ws75000016125000---6.155--4.264%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-09-23Jocelyn Larouchev4_computers21252--8.66306e-6--
2000-10-22Jocelyn Larouchev4_computers21254--3.46522e-5--
2000-10-28Jocelyn Larouchev4_computers21256--0.000--
2001-06-03Jocelyn Larouchev4_computers21257--0.000--
2003-11-28ANONYMOUSv4_computers21262--0.009--
2005-01-10ANONYMOUSv4_computers21263--0.023--
2022-05-21LordJuliusManual testing263265--0.082--
2008-06-12Sturle Sundejodel.ifi265266--0.108--
2010-04-25eon_blue_apocalypseFloppteron266267--0.216--
2010-04-28eon_blue_apocalypseFloppteron267268--0.432--
2010-05-02eon_blue_apocalypseFloppteron268269--0.863--
2012-04-27Dr. Nowakazm79269270--1.726--
2012-10-01[DPC] hansRManual testing270271--3.453--
2014-05-23AxelssonManual testing271272--6.906--
2014-05-23AxelssonManual testing272273--13.81--
2014-05-23Mark RoseManual testing27327473.502239.369375.118.98


ECM factoring results:
No ECM results for M69255149


Lucas-Lehmer results:
No L-L results for M69255149


PRP results:
No PRP results for M69255149


P-1 factor-bounds graph:
B1 = 750000, B2 = 16125000 (P-1 stage 2)
B1 = 750000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
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272
271
270
269
268
267
266
265
263
262
257
256
254
252
this exponent TF target: 74
TF double-checked to: 67.7
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280
Last modified: 2023-03-25T13:08:14+00:00