is 2 102864959 - 1
has 30965439 decimal digits
takes 409.567 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-
PRPF8C54C9082A2B61FPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual276148.777564.4737%8550001795500010.31493.8344%159.092465.8359%
Target276148.777564.4737%6500002200000010.46823.8537%159.245765.8428%
Difference---+205000-4045000-0.1533-0.0192%-0.1533-0.0068%

Known prime factors:
No known factors for M102864959

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-03-02Ben Deloi-0d654afec02152efa8550001795500012---10.31--3.834%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-04-191997rj7compa263264--0.019--
2010-08-20Donna NobleATH2-630-temp264265--0.036--
2012-04-25Mr-PlonkLinux-i7265266--0.073--
2013-09-09JoDuManual testing266267--0.145--
2013-09-18AmothP4_2Ghz267268--0.291--
2013-12-15PascalBieriManual testing268269--0.581--
2014-06-16Arne BPC_Ente269270--1.162--
2014-10-20symallad6corething270271--2.325--
2014-10-20PascalBieriManual testing270271--2.325--
2014-12-13Simon HarrisonManual testing271272--4.649--
2020-01-30Architects CubedManual testing272273--9.299--
2020-02-01Hans LoeblichManual testing273274--18.60--
2020-10-24ktonyGPU72_TF274275--37.19--
2020-10-27RichD0GPU72_TF275276--74.39--


ECM factoring results:
No ECM results for M102864959


Lucas-Lehmer results:
No L-L results for M102864959


PRP results:
dateuseridcompidcofactorsres64PRP
2021-03-04Ben Deloi-0d654afec02152efaF8C54C9082A2B61Fno


P-1 factor-bounds graph:
B1 = 855000, B2 = 17955000 (P-1 stage 2)
B1 = 855000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
276
275
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67.7
250
260
270
280
Last modified: 2021-03-04T23:51:52+00:00