is 2 72533261 - 1
has 21834688 decimal digits
takes 193.926 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
Actual2791,687.959365.8228%----1,687.959365.8228%0.0000%
PrimeNet2703.294461.4286%320000140000004.13005.5350%7.424363.5635%2.1349%
GPU7227452.746463.5135%500000170000005.42344.1213%58.169865.0172%1.5037%
Difference+5+1,635.2129+2.3093%-500000-17000000-5.4234-4.1213%+1,629.7895+0.8056%+0.8056%

Known prime factors (1 factor, 82.2 bits, 0.00011339% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7253326157235598342619310837928412582.24339454725703439220
22 × 3 × 5 × 163 × 436399 × 9244351
2015-08-25436399924435118,0633.55223.6468

P-1 results:
No P-1 results for M72533261


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-05-18T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2008-09-19T11:21:00Wojciech FlorekManual testing21264--0.049--
2010-07-20T08:14:00ANONYMOUS264265--0.052--
2010-09-24T16:02:00Sid & AndyRollerBob265266--0.103--
2011-05-14T11:30:00albin_pouillesacer-windows266267--0.206--
2011-06-07T13:18:00tscv4_computers21270--3.294--
2011-09-22T00:00:00tscv4_computers21270--3.294--
2014-06-13T11:59:00HBendtzManual testing270271--3.297--
2015-03-01T10:31:00srow7Manual testing271272--6.594--
2015-07-26T15:01:00TheJudgerManual testing272273--13.19--
2015-07-26T15:01:00TheJudgerManual testing273274--26.37--
2015-07-26T15:01:00TheJudgerManual testing274275--52.75--
2015-08-25T12:52:00Smok_bmvManual testing275276--105.5--
2015-08-25T12:52:00Smok_bmvManual testing276277--211.0--
2015-08-25T12:52:00Smok_bmvManual testing277278--422.0--
2015-08-25T12:52:00Smok_bmvManual testing278279--844.0--
Missing TF 79 - 80
Missing TF 80 - 81
Missing TF 81 - 82
2015-08-25T12:52:00Smok_bmvManual testing28228382.243254,560395.19,290


ECM factoring results:
No ECM results for M72533261


Lucas-Lehmer results:
No L-L results for M72533261


PRP results:
No PRP results for M72533261


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
283
279
278
277
276
275
274
273
272
271
270
267
266
265
264
257
250
260
270
280
290
2100
Last modified: 2015-08-25T12:52:00+00:00