is 2 4809773 - 1
has 1447886 decimal digits
takes 0.633 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L66A505BC52B622ABdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272198.831368.0556%420000109200000.18943.1892%199.020869.0743%1.0188%
PrimeNet2610.063962.2951%200004500000.00833.2258%0.072263.5114%1.2163%
GPU722651.516864.6154%320006500000.01252.3230%1.529465.4374%0.8220%
Difference+7+197.3145+3.4402%+388000+10270000+0.1769+0.8662%+197.4914+3.6370%+0.1968%

Known prime factors:
No known factors for M4809773

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-30T22:21:00Carsten Kossendeydurandal30000420000---0.010--0.756%
2013-12-02T06:07:00David Campeaui5-2500k42000010920000---0.189--3.189%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:01Mark RoseManual testing21261--0.064--
2010-05-11T09:56:00markroldgamer261262--0.064--
2011-09-11T01:59:00GrunwalderGIMPManual testing21263--0.332--
2016-02-23T16:39:01Mark RoseManual testing262263--0.204--
2015-01-04T19:09:00VictordeHollanderManual testing263264--0.408--
2015-01-04T19:09:00VictordeHollanderManual testing264265--0.777--
2015-07-17T22:44:00snme2pm1Manual testing265266--1.554--
2017-11-12T10:00:13YxinityManual testing266267--3.107--
2018-05-08T11:46:20ramgeisManual testing267268--6.215--
2020-12-02T18:46:09-Anonymous-Manual testing268269--12.43--
2020-12-02T18:46:09-Anonymous-Manual testing269270--24.86--
2020-12-02T18:46:09-Anonymous-Manual testing270271--49.72--
2020-12-07T17:00:22-Anonymous-Manual testing271272--99.43--


ECM factoring results:
Total ECM effort:1.784 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.784


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-03-15T00:00:00ANONYMOUSv4_computers66A505BC52B622AB0.633


PRP results:
No PRP results for M4809773


P-1 factor-bounds graph:
B1 = 420000, B2 = 10920000 (P-1 stage 2)
B1 = 420000 (P-1 stage 1)
B1 = 30000, B2 = 420000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2020-12-07T17:00:22+00:00