is 2 4591991 - 1
has 1382328 decimal digits
takes 0.605 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC22B73516F4D5704double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.470865.6716%102500010250000.19573.0098%6.666566.7049%1.0332%
PrimeNet2610.066962.2951%190004000000.00763.0749%0.074563.4545%1.1594%
GPU722651.588864.6154%280006000000.01132.1864%1.600165.3890%0.7736%
Difference+2+4.8820+1.0563%+997000+425000+0.1844+0.8235%+5.0664+1.3158%+1.3158%

Known prime factors (1 factor, 63.5 bits, 0.00138195% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4591991126793480326116407272063.4591380593737293
3 × 953 × 482893927
2010-05-029534828939270.46175.02319.3814

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2007-11-17T00:00:00Richard B. Woodsv4_computers10250001025000---0.196--3.010%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21261--0.067--
2007-01-01T00:00:00Richard B. Woodsv4_computers21262--0.134--
2007-06-15T00:00:00Richard B. Woodsv4_computers21263--0.348--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
No L-L results for M4591991


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:14:16kkmrkkblmbrbkManual testing
12679348032611640727
206E003FD984FF__no
2018-02-25T20:42:23Oliver KruseGTX-3
12679348032611640727
206E003FD984FF__no


P-1 factor-bounds graph:
B1 = 1025000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
263
262
261
250
260
270
280
290
2100
Last modified: 2018-02-25T20:42:23+00:00