is 2 25772137 - 1
has 7758187 decimal digits
takes 22.085 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L43911D437BB902DBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.550264.7887%3800003800000.47221.6471%19.022465.3687%0.5800%
PrimeNet2660.573062.1212%12000045000000.44565.1768%1.018764.0821%1.9609%
GPU722709.271764.2857%19000055000000.59563.7795%9.867265.6355%1.3498%
Difference+1+9.2785+0.5030%+190000-5120000-0.1234-2.1324%+9.1551-0.2668%-0.2668%

Known prime factors (1 factor, 67.8 bits, 0.00026291% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
257721372496983610037443447292167.7594844347230572
22 × 83 × 14591407321
2011-11-0883145914073211.8689987.821,845.0

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-03-06T00:00:00ANONYMOUSv4_computers380000380000---0.472--1.647%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-11-08T06:12:00Carsten KossendeyManual testing??67.759210.71645.061.461
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2004-04-20T00:00:00ANONYMOUSv4_computers21262--0.024--
2004-04-29T00:00:00ANONYMOUSv4_computers21262--0.024--
2004-07-02T00:00:00JonnyOv4_computers21267--1.153--
2011-11-08T06:12:00Carsten KossendeyManual testing267271--17.40--


ECM factoring results:
No ECM results for M25772137


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-07-17T00:00:00ANONYMOUSv4_computers43911D437BB902DB22.09


PRP results:
No PRP results for M25772137


P-1 factor-bounds graph:
B1 = 380000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
271
267
262
256
2
250
260
270
280
290
2100
Last modified: 2011-11-08T06:12:40+00:00