is 2 27184279 - 1
has 8183284 decimal digits
takes 25.164 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAECE474B5210E3FCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27117.586664.7887%32000066400000.89173.8413%18.478366.1413%1.3526%
PrimeNet2660.543362.1212%12000045000000.48145.2135%1.024764.0960%1.9748%
GPU722708.790064.2857%20000060000000.69263.9047%9.482665.6802%1.3945%
Difference+1+8.7965+0.5030%+120000+640000+0.1991-0.0633%+8.9956+0.4611%+0.4611%

Known prime factors (1 factor, 67.5 bits, 0.00024829% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
271842792082518756778824452092167.4973830373350676
22 × 32 × 19 × 71917 × 77867
2011-07-2171917778672.01550.09700.1965

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2006-02-15T00:00:00f1avalanchev4_computers3200006640000---0.892--3.841%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-07-21T09:17:00Carsten KossendeyManual testing??67.497210.92251.291.880
2001-08-18T00:00:00Net_Forcev4_computers21256--0.000--
2004-03-26T00:00:00ANONYMOUSv4_computers21262--0.023--
2004-11-22T00:00:00ANONYMOUSv4_computers21267--1.093--
2011-07-21T09:16:00Carsten KossendeyManual testing267271--16.49--


ECM factoring results:
No ECM results for M27184279


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2006-03-14T00:00:00f1avalanchev4_computersAECE474B5210E3FC25.16


PRP results:
No PRP results for M27184279


P-1 factor-bounds graph:
B1 = 320000, B2 = 6640000 (P-1 stage 2)
B1 = 320000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
271
267
262
256
2
250
260
270
280
290
2100
Last modified: 2011-07-21T09:17:00+00:00