is 2 118877183 - 1
has 35785598 decimal digits
takes 548.981 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual277257.477264.9351%6300006300004.21861.2836%261.695865.3852%
Target276128.737964.4737%80000014000000056.14084.2131%184.878665.9704%
Difference+1+128.7393+0.4614%-170000-139370000-51.9222-2.9295%+76.8172-0.5853%

Known prime factors (1 factor, 79.4 bits, 0.00006681% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1188771838084211313478326707540712479.4193400236744118645
5 × 37 × 131 × 173 × 2683 × 302273		2023-08-1926833022731,503.60.12730.2060

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2023-08-17Extremofiredhtrayner_oncall6300006300002479.4194.2191,0988.4371.284%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-05-14Donna NoblePhenom9550263264--0.017--
2010-10-15Charles A. Morrischandra264265--0.031--
2012-07-19carlos56amd600265266--0.063--
2014-06-19snme2pm1Manual testing266267--0.126--
2014-07-10snme2pm1Manual testing267268--0.251--
2014-10-05snme2pm1Manual testing268269--0.503--
2014-10-05snme2pm1Manual testing269270--1.006--
2015-03-08snme2pm1Manual testing270271--2.012--
2015-04-24caddrManual testing271272--4.023--
2017-12-11snme2pm1Manual testing272273--8.046--
2019-05-28Niels_Mache_NextcloudManual testing273274--16.09--
2021-07-07TheJudgerManual testing274275--32.18--
2021-07-07TheJudgerManual testing275276--64.37--
2022-04-15laxeyeManual testing276277--128.7--


ECM factoring results:
No ECM results for M118877183


Lucas-Lehmer results:
No L-L results for M118877183


PRP results:
No PRP results for M118877183


P-1 factor-bounds graph:
B1 = 630000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
277
276
275
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67.9
250
260
270
280
JSON version of this page
Last modified: 2023-10-02T12:12:48+00:00