is 2 4195969 - 1
has 1263113 decimal digits
takes 0.523 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5E1421EB01D2D29Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.081565.6716%250003375000.00761.3502%7.089166.1352%0.4635%
PrimeNet2610.073262.2951%170003400000.00632.8341%0.079563.3637%1.0686%
GPU722651.738764.6154%220004500000.00821.8745%1.746965.2787%0.6633%
Difference+2+5.3428+1.0563%+3000-112500-0.0006-0.5242%+5.3422+0.8565%+0.8565%

Known prime factors (1 factor, 62.1 bits, 0.00147930% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
419596948448112136033966971962.071577317326892
22 × 3 × 192 × 41 × 3250441
2009-12-0136132504410.23210.03210.0598

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-03T19:28:00Carsten Kossendeyleela25000337500---0.008--1.350%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-31T00:00:00ANONYMOUSv4_computers21260--0.037--
2001-12-01T00:00:00ANONYMOUSv4_computers21261--0.073--


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:
dateuseridcompidres64spent (GHz-days)
1998-05-16T00:00:00ANONYMOUSv4_computers5E1421EB01D2D29E0.523
1999-10-15T00:00:00ANONYMOUSv4_computers74D2D18FA5DD53__0.523
2000-01-12T00:00:00ANONYMOUSv4_computers5E1421EB01D2D29E0.523


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:31:44kkmrkkblmbrbkManual testing
4844811213603396697
B3679158456724__no
2018-01-20T05:40:57Oliver KruseGTX-1
4844811213603396697
B3679158456724__no


P-1 factor-bounds graph:
B1 = 25000, B2 = 337500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
TF factor-bounds graph:
267
261
260
250
260
270
280
290
2100
Last modified: 2018-01-20T05:40:57+00:00