is 2 25082543 - 1
has 7550598 decimal digits
takes 21.494 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB364FCD3055F5FF6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27119.060264.7887%3700003700000.45981.6205%19.520065.3593%0.5706%
PrimeNet2660.588862.1212%11000040000000.40004.9797%0.988864.0075%1.8863%
GPU722709.526664.2857%18000055000000.58383.7343%10.110465.6194%1.3337%
Difference+1+9.5336+0.5030%+190000-5130000-0.1241-2.1137%+9.4096-0.2600%-0.2600%

Known prime factors (1 factor, 67.9 bits, 0.00027059% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
250825432699125671148447122492167.8715380486482468
22 × 3 × 23857 × 18794227
2011-10-2723857187942272.06371.30042.3764

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-08-20T00:00:00ANONYMOUSv4_computers370000370000---0.460--1.621%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-10-27T20:10:00Carsten KossendeyManual testing??67.871210.87943.791.791
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2003-11-16T00:00:00markrv4_computers21262--0.024--
2004-06-12T00:00:00ANONYMOUSv4_computers21267--1.185--
2011-10-27T20:10:00Carsten KossendeyManual testing267271--17.88--


ECM factoring results:
No ECM results for M25082543


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-11-22T00:00:00ANONYMOUSv4_computersB364FCD3055F5FF621.49


PRP results:
No PRP results for M25082543


P-1 factor-bounds graph:
B1 = 370000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
271
267
262
258
256
2
250
260
270
280
290
2100
Last modified: 2011-10-27T20:10:19+00:00