is 2 2901229 - 1
has 873357 decimal digits
takes 0.224 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L349173D7C6892F83double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.241867.1642%100000011000000.11262.9043%10.354468.1178%0.9536%
PrimeNet2590.026562.7119%130002400000.00283.0023%0.029363.8314%1.1195%
GPU722630.550165.0794%160003000000.00351.9092%0.553665.7461%0.6667%
Difference+4+9.6917+2.0848%+984000+800000+0.1091+0.9951%+9.8008+2.3718%+2.3718%

Known prime factors (1 factor, 81.6 bits, 0.00281177% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
290122936043618484850048030835192581.576621178446872860571
41 × 107 × 773 × 13883 × 13194287
2016-09-181388313194287329,2370.08200.1504

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-02T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.303%
2009-07-03T21:41:00Carsten Kossendeyleela15000168750---0.003--0.862%
2010-03-31T08:36:00Rob_Deetwopc100000200000---0.012--1.370%
2010-04-01T10:25:00Rob_Deetwopc200000300000---0.023--1.698%
2010-04-02T12:40:00Rob_Deetwopc300000400000---0.034--1.939%
2010-04-03T11:31:00Rob_Deetwopc400000500000---0.045--2.135%
2010-04-04T11:32:00Rob_Deetwopc500000600000---0.057--2.303%
2010-04-05T13:01:00Rob_Deetwopc600000700000---0.068--2.449%
2010-04-06T16:45:00Rob_Deetwopc700000800000---0.079--2.579%
2010-04-07T12:04:00Rob_Deetwopc800000900000---0.090--2.697%
2010-04-08T11:19:00Rob_Deetwopc9000001000000---0.101--2.805%
2010-04-09T10:23:00Rob_Deetwopc10000001100000---0.113--2.904%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-08T00:00:00ANONYMOUSv4_computers21259--0.026--
2016-02-23T16:29:24Mark RoseManual testing259260--0.026--
2009-02-13T15:01:00Sturle Sundegowin.ifi260261--0.053--
2011-12-08T01:47:00Grant McCrackenthumper261262--0.106--
2013-01-07T13:47:00dbaughManual testing262263--0.338--
2015-04-25T17:15:00VictordeHollanderManual testing263264--0.677--
2015-04-25T17:15:00VictordeHollanderManual testing264265--1.288--
2016-02-20T18:16:55YxinityManual testing265266--2.576--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.362 GHz-days
Estimated T-Level:0.650
DigitsB1CurvesCompleteFacMiss
201100013 / 1000.13087.752%
255000013 / 2800.04695.455%

New Calculation Method

Total ECM effort:1.362 GHz-days
Estimated T-Level:0.650
DigitsB1CompleteFacMiss
20110000.41965.747%
25500000.03896.281%
302500000.00299.767%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.258
50000500000010.105


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-08T00:00:00ANONYMOUSv4_computers66A81EE8AA9314__0.224
1999-05-16T00:00:00ANONYMOUSv4_computers349173D7C6892F830.224
1999-10-07T00:00:00ANONYMOUSv4_computers349173D7C6892F830.224


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-24T18:56:15Oliver KruseGTX-2
3604361848485004803083519
A6D00A7FBBBC1E__no
2017-12-08T13:18:45kkmrkkblmbrbkc4.xlarge
3604361848485004803083519
A6D00A7FBBBC1E__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 1100000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 900000, B2 = 1000000 (P-1 stage 2)
B1 = 900000 (P-1 stage 1)
B1 = 800000, B2 = 900000 (P-1 stage 2)
B1 = 800000 (P-1 stage 1)
B1 = 700000, B2 = 800000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
B1 = 600000, B2 = 700000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 500000, B2 = 600000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 400000, B2 = 500000 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
B1 = 300000, B2 = 400000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 15000, B2 = 168750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2017-12-08T13:18:45+00:00