is 2 27152507 - 1
has 8173720 decimal digits
takes 25.135 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L10542B0DFB5D2629double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27235.220865.2778%25500012750000.41692.2348%35.637766.0537%0.7760%
PrimeNet2660.543962.1212%12000045000000.48145.2127%1.025364.0957%1.9745%
GPU722708.800364.2857%20000060000000.69263.9040%9.492965.6800%1.3943%
Difference+2+26.4205+0.9921%+55000-4725000-0.2757-1.6693%+26.1448+0.3737%+0.3737%

Known prime factors:
No known factors for M27152507

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-01-10T00:00:00ANONYMOUSv4_computers2550001275000---0.417--2.235%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-18T00:00:00Net_Forcev4_computers21256--0.000--
2002-08-31T00:00:00Jocelyn Larouchev4_computers21257--0.001--
2004-03-16T00:00:00ANONYMOUSv4_computers21262--0.023--
2004-12-13T00:00:00ANONYMOUSv4_computers21267--1.094--
2016-01-17T22:08:20NRManual testing267268--1.101--
2018-04-09T13:24:10VictordeHollanderManual testing268269--2.202--
2018-09-11T02:25:26chuenkitManual testing269270--4.403--
2021-02-19T19:50:04mikrManual testing270271--8.807--
2021-04-22T14:40:09Sid & AndyManual testing271272--17.61--


ECM factoring results:
No ECM results for M27152507


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-02-02T00:00:00ANONYMOUSv4_computers10542B0DFB5D262925.13
2011-09-20T05:33:00ANONYMOUS10542B0DFB5D262925.13


PRP results:
No PRP results for M27152507


P-1 factor-bounds graph:
B1 = 255000, B2 = 1275000 (P-1 stage 2)
B1 = 255000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
272
271
270
269
268
267
262
257
256
250
260
270
280
290
2100
Last modified: 2021-04-22T14:40:09+00:00