is 2 18819953 - 1
has 5665371 decimal digits
takes 11.998 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.578962.6866%----1.578962.6866%0.0000%
PrimeNet2650.387761.5385%9000028000000.21974.8262%0.607363.3947%1.8562%
GPU722696.343663.7681%13000036000000.29493.4753%6.638665.0273%1.2592%
Difference-2-4.7648-1.0815%-130000-3600000-0.2949-3.4753%-5.0597-2.3407%-2.3407%

Known prime factors (3 factors, 149.4 bits, 0.00079366% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
188199536454491080891239.23217148
22 × 3 × 1429
-414296.661e-97.546e-50.0001
188199537824583659291239.50920788
22 × 5197
2008-09-08451975.836e-90.00030.0005
1881995318204279683988962083992270.62548364306977783
3 × 163 × 31153 × 3174799
2021-08-1231153317479922.9360.18710.2986

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
188199535050370544056494358996812478.741
18819953117499360854333783508321842063951134109.856
18819953142440909344484957767115538523767134110.134
1881995391938357891783921641861557314378394423362071945149.366
P-1 results:
Exponent "18819953" not found


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-08-12T19:07:18ATHec2-P_11000001000000027P-12270.6250.600


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08T14:38:00Will EdgingtonManual testing??39.509121.94406e-924.834.02397e-9


ECM factoring results:
Exponent "18819953" not found


Lucas-Lehmer results:
Exponent "18819953" not found


PRP results:
Exponent "18819953" not found


P-1 factor-bounds graph:
B1 = 100000, B2 = 10000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2021-08-12T19:07:18+00:00