is 2 2022893 - 1
has 608952 decimal digits
takes 0.133 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9848D66224CD40A4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.688868.6567%580000150800000.13065.2236%14.819470.2940%1.6373%
PrimeNet2580.019063.7931%90001500000.00162.6127%0.020664.7391%0.9460%
GPU722620.303766.1290%80001200000.00131.2737%0.305066.5604%0.4314%
Difference+5+14.3851+2.5277%+572000+14960000+0.1293+3.9499%+14.5144+3.7335%+3.7335%

Known prime factors (1 factor, 75.2 bits, 0.00371925% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2022893445051485077216172231592375.23611000371375975303
7 × 37 × 42472476355117
2015-07-0337424724763551176,126.8220,613412,043

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-28T00:00:00Jocelyn Larouchev4_computers20002000---0.000--0.022%
2003-01-01T00:00:00ANONYMOUSv4_computers25000412500---0.004--1.247%
2010-12-10T00:56:00Jocelyn LaroucheManual testing202289202289---0.019--1.334%
2013-10-21T00:03:00David Campeaui5-2500k58000015080000---0.131--5.224%
2016-03-17T19:19:41alpertronManual testing5000001500000012---0.123--5.130%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-02T00:00:00ANONYMOUSv4_computers21258--0.019--
2022-03-09T07:16:46LordJuliusManual testing21260--0.076--
2009-01-02T11:56:00Sturle Sundefoster.ifi260261--0.076--
2012-02-05T16:47:00Sebastian HornbostelManual testing261262--0.152--
2013-02-11T20:23:00dbaughManual testing262263--0.485--
2015-04-10T15:56:00VictordeHollanderManual testing263264--0.971--
2015-04-10T15:56:00VictordeHollanderManual testing264265--1.847--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.710 GHz-days
Estimated T-Level:1.600
DigitsB1CurvesCompleteFacMiss
201100032 / 1000.32072.498%
255000032 / 2800.11489.182%

New Calculation Method

Total ECM effort:2.710 GHz-days
Estimated T-Level:1.600
DigitsB1CompleteFacMiss
20110001.03235.620%
25500000.09391.093%
302500000.00699.427%


ECM Summary

B1B2factorcurvesGHz-days
500005000000292.456
50000500000030.254


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23T00:00:00ANONYMOUSv4_computers9848D66224CD40A40.133


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-06T00:52:57Oliver KruseGTX-0
44505148507721617223159
F6EBA8C9934D13__no
2017-11-14T03:59:12kkmrkkblmbrbkc4.xlarge
44505148507721617223159
F6EBA8C9934D13__no


P-1 factor-bounds graph:
B1 = 580000, B2 = 15080000 (P-1 stage 2)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 580000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 202289 (P-1 stage 1)
B1 = 25000, B2 = 412500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2022-05-10T18:46:00+00:00