is 2 930283 - 1
has 280044 decimal digits
takes 0.023 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF55AB0FAB49ED309double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26731.940770.1493%1000000300000000.09075.7391%32.031471.8624%1.7132%
PrimeNet2400.000050.0000%80003600000.001023.3982%0.001061.6991%11.6991%
GPU722440.000054.5455%150006000000.001618.0511%0.001762.7505%8.2050%
Difference+23+31.9407+15.6038%+985000+29400000+0.0891-12.3120%+32.0298+9.1119%+9.1119%

Known prime factors (1 factor, 80.5 bits, 0.00865212% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
93028316969140518545508845816732580.489912041847402645692
22 × 1321 × 172604437434263
2009-06-231321172604437434263511,166330,667617,594

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-07-17T00:00:00ANONYMOUSv4_computers600001400000---0.005--1.917%
2002-04-28T00:00:00ANONYMOUSv4_computers163841638400---0.004--1.312%
2002-07-20T00:00:00ANONYMOUSv4_computers327683276800---0.007--1.961%
2002-12-31T00:00:00ANONYMOUSv4_computers655366553600---0.015--2.751%
2003-09-09T00:00:00ANONYMOUSv4_computers13107213107200---0.029--3.668%
2016-03-17T18:54:26alpertronManual testing20000050000006---0.016--3.278%
unknown100000030000000---0.091--5.739%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-06-28T00:00:00ANONYMOUSv4_computers21255--0.005--
2000-06-29T00:00:00ANONYMOUSv4_computers21255--0.005--
2000-12-07T00:00:00ANONYMOUSv4_computers21256--0.010--
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.021--
2003-08-25T00:00:00ANONYMOUSv4_computers21258--0.041--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.070 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000323 / 1003.2303.892%
2550000323 / 2801.15431.486%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:14.070 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.7310.000%
25500001.61319.937%
302500000.13187.717%
3510000000.00999.131%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002797.867
25000025000000446.203


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-08-31T00:00:00ANONYMOUSv4_computersF55AB0FAB49ED3090.023
2002-01-08T00:00:00ANONYMOUSv4_computersF55AB0FAB49ED3090.023


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T10:11:39Oliver KruseGTX-1
1696914051854550884581673
6AC893735FE6A6__no
2017-10-14T22:51:27Oliver KruseThreadripper6AC893735FE6A6__no
2017-12-22T10:44:41ATHec2-1xf
1696914051854550884581673
6AC893735FE6A6__no
2020-04-23T15:56:47Oliver KruseAddPrpType5
1696914051854550884581673
1EDDC106ABD5BE__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 60000, B2 = 1400000 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 16384 (P-1 stage 1)
102
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105
106
102
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105
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107
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109
1010
1011
1012
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1015
TF factor-bounds graph:
267
258
257
256
255
250
260
270
280
290
2100
Last modified: 2020-04-23T15:56:47+00:00