is 2 74578853 - 1
has 22450472 decimal digits
takes 206.188 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
Actual275102.601664.0000 %6400006400002.56561.5226 %105.167264.5482 %
Target27451.299663.5135 %5000008500000020.46024.1354 %71.759865.0224 %
Difference+1+51.3020+0.4865 %+140000-84360000-17.8945-2.6128 %+33.4075-0.4742 %

Known prime factors (1 factor, 90.1 bits, 0.00012078% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7457885313056596233738656230546370072890.0778753551247120049051
3 × 112 × 23 × 421 × 1153 × 40879 × 52837
2016-02-2340879528375,931,7520.16650.3335

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-02-23NesowaTesting64000064000012890.0772.5661.710%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-03-31Jossv4_computers212570.000
2022-06-02LordJuliusManual testing21264
2010-09-25ANONYMOUSww56132642650.050
2010-09-26RhyledRhyled2652660.100
2010-09-30korvadualcore12662670.200
2010-10-02eon_blue_apocalypse6pack-22672680.401
2010-10-05eon_blue_apocalypse6pack-22682690.802
2013-01-03SWL551Manual testing26927211.22
2015-10-24Judge HaleManual testing27227312.83
2016-02-16AirSquirrelsManual testing27327576.95


ECM factoring results:
No ECM results for M74578853


Lucas-Lehmer results:
No L-L results for M74578853


PRP results:
No PRP results for M74578853


CERT results:
No CERT results for M74578853


P-1 factor-bounds graph:
B1 = 640000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
273
272
269
268
267
266
265
264
257
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
2100
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00