is 2 74207321 - 1
has 22338630 decimal digits
takes 205.161 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
Actual2670.400459.7015%----0.400459.7015%0.0000%
PrimeNet2703.220061.4286%320000140000004.27075.5503%7.490763.5694%2.1408%
GPU7227451.556463.5135%500000170000005.60824.1329%57.164665.0215%1.5079%
Difference-7-51.1560-3.8120%-500000-17000000-5.6082-4.1329%-56.7642-5.3200%-5.3200%

Known prime factors (2 factors, 127.1 bits, 0.00017132% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7420732198978833144481823671963.10266690746823
3 × 193 × 359 × 320843
2008-09-123593208430.03700.07140.1309
74207321188531290581599284732064.031127030115116
22 × 31757528779
2017-06-294317575287790.09396,936.212,955

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
7420732118660607152989933158298279692957983559139127.133
P-1 results:
No P-1 results for M74207321


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-12T23:29:00lycornManual testing??63.102190.015421.40.032
2017-06-29T13:20:52TJAOIManual testing264265*64.031200.046421.40.094


ECM factoring results:
No ECM results for M74207321


Lucas-Lehmer results:
No L-L results for M74207321


PRP results:
No PRP results for M74207321


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
265
2
250
260
270
280
290
2100
Last modified: 2017-06-29T13:20:52+00:00