is 2 238533661 - 1
has 71805787 decimal digits
takes 2,507.916 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2724.009261.1111%----4.009261.1111%0.0000%
PrimeNet27532.078962.6667%9000005500000058.65595.6996%90.734964.7945%2.1278%
GPU72279513.274364.5570%14000005500000065.86324.1924%579.137566.0429%1.4859%
Difference-7-509.2651-3.4459%-1400000-55000000-65.8632-4.1924%-575.1283-4.9318%-1.4859%

Known prime factors (2 factors, 132.5 bits, 0.00005554% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
238533661360122909795226963592064.96575486811439
13 × 5806677803
2011-07-131358066778030.02554,823.09,008.0
2385336612095339306486922922412167.506439212498920
23 × 5 × 13 × 844639421
2022-09-22138446394210.1821701.561,310.3

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
238533661754579688060383567665442596320473465051940132.471
P-1 results:
No P-1 results for M238533661


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-07-13T16:01:00RichardFX5000_1??64.965200.0115,1400.022
2010-05-20T19:20:00Architects Cubedm1_12263264--0.008--
2022-09-22T09:48:31TJAOIManual testing267268*67.506210.0585,1400.118
2022-09-25T22:01:24LordJuliusManual testing2126867.506210.1825,1400.373
2022-09-25T22:01:24LordJuliusManual testing2126864.965200.0255,1400.052
2022-09-25T22:01:24LordJuliusManual testing268269--0.251--
2022-09-25T22:01:24LordJuliusManual testing269270--0.501--
2022-09-25T22:01:24LordJuliusManual testing270271--1.002--
2022-09-25T22:01:24LordJuliusManual testing271272--2.005--


ECM factoring results:
No ECM results for M238533661


Lucas-Lehmer results:
No L-L results for M238533661


PRP results:
No PRP results for M238533661


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
272
271
270
269
268
264
2
250
260
270
280
290
2100
Last modified: 2022-09-25T22:01:24+00:00