is 2 72712529 - 1
has 21888653 decimal digits
takes 194.405 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
Actual275105.235164.0000 %6200006200002.40361.4957 %107.638764.5384 %
Target27452.616363.5135 %5000008500000019.78614.1225 %72.402465.0177 %
Difference+1+52.6188+0.4865 %+120000-84380000-17.3825-2.6269 %+35.2363-0.4792 %

Known prime factors (1 factor, 82.7 bits, 0.00011380% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7271252981240352769251604195633272582.74855864067641803247
523 × 10847 × 39631 × 248477
2015-08-223963124847724,8620.19780.3127

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-08-22Massimo Cappelli (ik5pwa)maxlinux_862000062000012582.7482.4041.680%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-19Wojciech FlorekManual testing212640.026
2010-05-21ANONYMOUS2642650.051
2010-05-21Kevin BrushMac_Pro2652660.103
2010-05-27Jim Blaschakhunkajunk2662670.206
2010-05-31arnaudSRV-2402672680.411
2010-06-05Aldo_GridEEpc10002682690.822
2012-10-06RonnyKarlGrayBox2692701.644
2013-04-20cavejohnson44Desktop2702713.289
2015-03-14el groccoManual testing2712726.577
2015-08-17GregManual testing27227592.08


ECM factoring results:
No ECM results for M72712529


Lucas-Lehmer results:
No L-L results for M72712529


PRP results:
No PRP results for M72712529


CERT results:
No CERT results for M72712529


P-1 factor-bounds graph:
B1 = 620000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
272
271
270
269
268
267
266
265
264
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00