is 2 72051011 - 1
has 21689516 decimal digits
takes 192.636 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
Actual27453.099463.5135%----53.099463.5135%
Target27453.099463.5135%500000170000005.42344.1179%58.522865.0160%
Difference----500000-17000000-5.4234-4.1179%-5.4234-1.5025%

Known prime factors (2 factors, 205.0 bits, 0.00028453% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
72051011293345538082334061489461169292994.567203567954155656512224
25 × 11 × 139 × 51817 × 143141 × 560939
2014-08-2514314156093977,423,5730.64321.1294
72051011176234459466644521493822843818548134110.44112229839458230816601159340
22 × 3 × 5 × 43 × 83 × 401 × 409 × 10429 × 62081 × 537841
2014-08-25620815378411.851e+90.34120.4898

1 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2014-08-25Patrik Johanssontheta62205.008-385.3-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-19Wojciech FlorekManual testing21264--0.049--
2011-02-06Rob_Deetwopc264265--0.052--
2011-03-28eon_blue_apocalypsecon-cloud0-cn0265266--0.104--
2011-04-04Carsten KossendeyManual testing266267--0.207--
2011-04-04Carsten KossendeyManual testing267268--0.415--
2011-04-26tscv4_computers21270--3.316--
2011-09-22tscv4_computers21270--3.316--
2013-04-13SMoffatManual testing270271--3.319--
2014-07-02NickOfTimeManual testing271272--6.638--
2014-07-02NickOfTimeManual testing272273--13.28--
2014-07-02NickOfTimeManual testing273274--26.55--


ECM factoring results:
No ECM results for M72051011


Lucas-Lehmer results:
No L-L results for M72051011


PRP results:
No PRP results for M72051011


P-1 factor-bounds graph:
103
104
105
106
103
104
105
106
TF factor-bounds graph:
274
273
272
271
270
268
267
266
265
264
this exponent TF target: 74
TF double-checked to: 67.8
250
260
270
280
290
2100
2110
2120
Last modified: 2023-04-26T21:34:10+00:00