is 2 26903413 - 1
has 8098735 decimal digits
takes 24.904 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDEBCD65DC6684E38double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27117.770264.7887%25500012750000.41692.4970%18.187065.6680%0.8792%
PrimeNet2660.548962.1212%12000045000000.48145.2063%1.030364.0933%1.9721%
GPU722708.881864.2857%20000060000000.69263.8993%9.574465.6783%1.3926%
Difference+1+8.8884+0.5030%+55000-4725000-0.2757-1.4022%+8.6126-0.0103%-0.5134%

Known prime factors (1 factor, 67.9 bits, 0.00025231% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
269034132718211333886558299432167.8815051796465167
17 × 2371 × 125332981
2011-10-3023711253329811.49099.168617.119

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-01-20T00:00:00ANONYMOUSv4_computers2550001275000---0.417--2.497%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-10-30T12:13:00Carsten KossendeyManual testing??67.881210.38650.770.788
2002-02-17T00:00:00Jocelyn Larouchev4_computers21257--0.001--
2004-06-04T00:00:00ANONYMOUSv4_computers21262--0.023--
2004-09-16T00:00:00ANONYMOUSv4_computers21267--1.104--
2011-10-30T12:13:00Carsten KossendeyManual testing267271--16.67--


ECM factoring results:
No ECM results for M26903413


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-02-23T00:00:00ANONYMOUSv4_computers55576B0F6BC71E__24.90
2005-03-06T00:00:00ANONYMOUSv4_computers55576B0F6BC71E__24.90
2005-03-20T00:00:00ANONYMOUSv4_computers55576B0F6BC71E__24.90
2011-06-08T10:23:00Iván Arribasv8033cbprDEBCD65DC6684E3824.90


PRP results:
No PRP results for M26903413


P-1 factor-bounds graph:
B1 = 255000, B2 = 1275000 (P-1 stage 2)
B1 = 255000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
271
267
262
257
2
250
260
270
280
290
2100
Last modified: 2011-10-30T12:13:46+00:00