is 2 25749799 - 1
has 7751462 decimal digits
takes 22.066 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB35793F47AADB965double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.566364.7887%28000035000000.56593.2556%19.132265.9351%1.1463%
PrimeNet2660.573562.1212%12000045000000.44565.1762%1.019264.0819%1.9607%
GPU722709.279764.2857%18000055000000.58383.7475%9.863565.6241%1.3384%
Difference+1+9.2866+0.5030%+100000-2000000-0.0179-0.4919%+9.2687+0.3109%+0.3109%

Known prime factors (1 factor, 67.6 bits, 0.00026246% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
257497992209499476514739588472167.5824290323735177
1481 × 2896910017
2011-10-25148128969100171.2939196.12366.29

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-09-22T00:00:00ANONYMOUSv4_computers2800003500000---0.566--3.256%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-10-25T05:09:00Carsten KossendeyManual testing??67.582210.14044.960.285
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2004-04-29T00:00:001997rj7v4_computers21262--0.024--
2004-07-26T00:00:00PrimeCruncherv4_computers21267--1.154--
2011-10-25T05:09:00Carsten KossendeyManual testing267271--17.41--


ECM factoring results:
No ECM results for M25749799


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-10-04T00:00:00ANONYMOUSv4_computersB35793F47AADB96522.07


PRP results:
No PRP results for M25749799


P-1 factor-bounds graph:
B1 = 280000, B2 = 3500000 (P-1 stage 2)
B1 = 280000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
271
267
262
256
2
250
260
270
280
290
2100
Last modified: 2011-10-25T05:09:36+00:00