is 2 73438811 - 1
has 22107285 decimal digits
takes 203.036 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
Actual275104.194364.0000%6250006250002.50551.5033%106.699864.5412%0.5412%
PrimeNet2703.253761.4286%320000140000004.27075.5433%7.524463.5667%2.1381%
GPU7227452.096063.5135%500000170000005.60824.1276%57.704265.0195%1.5060%
Difference+1+52.0984+0.4865%+125000-16375000-3.1027-2.6243%+48.9957-0.4783%-0.4783%

Known prime factors (1 factor, 86.7 bits, 0.00011806% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
734388111261113494676889078596230172786.705858615136536516828
22 × 3 × 7 × 232 × 1021 × 39619 × 477677
2015-09-2939619477677259,9540.25450.3232

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-09-29T02:02:56Jwb52zClay6250006250002786.7052.506406.15.0111.503%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-05-05T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2008-06-28T14:28:00George WoltmanManual testing21264--0.048--
2010-06-05T12:21:00GrunwalderGIMPcompute-0-5264265--0.051--
2010-06-16T20:37:00Beat BucheliI7265266--0.102--
2010-06-17T08:24:00Gnorfe_k_kontor266267--0.204--
2010-06-23T05:06:00alexey77kadr1267268--0.407--
2010-07-09T05:10:00ANONYMOUS268269--0.814--
2012-10-09T05:54:00Gnorfe_resq1269270--1.628--
2014-08-04T16:34:00Mark RoseManual testing270271--3.256--
2015-01-11T14:34:00RichD0Manual testing271272--6.512--
2015-09-27T15:44:47AirSquirrelsManual testing272273--13.02--
2015-09-27T15:44:47AirSquirrelsManual testing273274--26.05--
2015-09-27T15:44:47AirSquirrelsManual testing274275--52.10--


ECM factoring results:
No ECM results for M73438811


Lucas-Lehmer results:
No L-L results for M73438811


PRP results:
No PRP results for M73438811


P-1 factor-bounds graph:
B1 = 625000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
265
264
257
250
260
270
280
290
2100
Last modified: 2015-09-29T02:02:56+00:00