is 2 2307959 - 1
has 694765 decimal digits
takes 0.156 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCF4EF1D402884210double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.874567.1642%50000003150000002.144210.3289%15.018870.5557%3.3916%
PrimeNet2580.016662.0690%100001900000.00192.9299%0.018663.1803%1.1113%
GPU722620.266264.5161%120002000000.00221.7387%0.268465.1331%0.6170%
Difference+5+12.6084+2.6481%+4988000+314800000+2.1420+8.5901%+14.7504+5.4227%+5.4227%

Known prime factors (1 factor, 76.5 bits, 0.00331293% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23079591040176497313742115955992476.46122534553198599761
3 × 11 × 607 × 7211 × 156009421
2017-10-18721115600942112,1730.83331.5551

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.284%
2010-02-16T08:20:00Budannan50000010000000---0.100--4.822%
2018-02-21T02:45:02alpertronManual testing5000001500000012---0.126--5.212%
2021-04-08T16:10:38ViliamF35000000315000000-
skipped known factor: 104017649731374211595599
--2.144--10.329%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-02-21T00:00:00ANONYMOUSv4_computers21258--0.017--
2004-04-29T00:00:00ANONYMOUSv4_computers21258--0.017--
2016-02-23T16:29:11Mark RoseManual testing258260--0.050--
2009-01-14T18:40:00Sturle Sundegigi.ifi260261--0.067--
2012-05-13T15:34:00Sebastian HornbostelManual testing261262--0.133--
2013-01-23T08:24:00dbaughManual testing262263--0.425--
2015-03-03T21:35:00VictordeHollanderManual testing263264--0.851--
2015-03-03T21:35:00VictordeHollanderManual testing264265--1.619--
2015-10-22T10:17:24ramgeisManual testing265266--3.238--
2017-05-31T02:32:34Gordon SpenceManual testing266267--6.476--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.276 GHz-days
Estimated T-Level:1.850
DigitsB1CurvesCompleteFacMiss
201100037 / 1000.37068.945%
255000037 / 2800.13287.601%

New Calculation Method

Total ECM effort:3.276 GHz-days
Estimated T-Level:1.850
DigitsB1CompleteFacMiss
20110001.42324.097%
25500000.13287.663%
302500000.00899.173%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.656
50000500000070.620


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersCF4EF1D4028842100.156
2004-04-29T00:00:00ANONYMOUSv4_computersCF4EF1D4028842100.156


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-18T17:17:05Oliver KruseGTX-0
104017649731374211595599
8A0CD3A57A281A__no
2017-11-23T04:24:15Chang Chia-Tcheexbpc13
104017649731374211595599
8A0CD3A57A281A__no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 315000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
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109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2021-04-08T16:10:38+00:00