is 2 91556789 - 1
has 27561340 decimal digits
takes 331.639 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
Actual277334.308064.9351%----334.308064.9351%0.0000%
PrimeNet2715.221761.9718%400000180000007.13725.5555%12.358964.0845%2.1127%
GPU7227583.575564.0000%600000220000009.27514.1387%92.850665.4899%1.4899%
Difference+2+250.7324+0.9351%-600000-22000000-9.2751-4.1387%+241.4574-0.5549%-0.5549%

Known prime factors (1 factor, 76.3 bits, 0.00008328% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
91556789899984979473394352037592376.252491490030014811
34 × 19 × 71 × 4497982319
2019-03-21814497982319305.761,287.12,404.0

P-1 results:
No P-1 results for M91556789


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-01-03T21:20:00Architects Cubedm1_16264265--0.041--
2013-06-17T11:17:00David CampeauManual testing265266--0.082--
2014-06-03T01:11:00SMoffatManual testing266267--0.163--
2014-06-08T10:33:00Alex HenrieManual testing267268--0.326--
2014-06-11T07:51:00Alex HenrieManual testing268269--0.653--
2014-06-16T09:34:00kutensprint-server1269270--1.306--
2015-03-18T11:46:00liceomajoranaorvietoinfo7270271--2.612--
2017-03-28T22:05:48monstManual testing271272--5.224--
2018-06-07T09:00:13Andrew LuebkeManual testing272273--10.45--
2018-06-20T09:00:04Tim SorberaManual testing273274--20.89--
2019-01-02T16:10:04Strolling JellyfishManual testing274275--41.79--
2019-01-02T16:10:04Strolling JellyfishManual testing275276--83.58--
2019-03-22T01:40:06Jon PaceManual testing27627776.25223138.6675.3282.3


ECM factoring results:
No ECM results for M91556789


Lucas-Lehmer results:
No L-L results for M91556789


PRP results:
No PRP results for M91556789


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
277
276
275
274
273
272
271
270
269
268
267
266
265
250
260
270
280
290
2100
Last modified: 2019-03-22T01:40:06+00:00