is 2 4979911 - 1
has 1499103 decimal digits
takes 0.690 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2675.966865.6716 %250000000515534736717056,499.994728.8159 %56,505.961475.5637 %
Target2651.465064.6154 %3400035000000.04482.4144 %1.509865.4697 %
Difference+2+4.5017+1.0563 %+249966000+5155343867170+56,499.9499+26.4015%+56,504.4516+10.0940 %

Known prime factors (8 factors, 510.8 bits, 0.01025688% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
497991149799111825.5705
5
-158.986e-132.448e-74.090e-7
4979911773795230775062971756.1037769167268
22 × 1942291817
2015-03-09419422918170.003721.26939.724
4979911146422930989418119112063.6671470136022405
5 × 167 × 1760641943
2017-04-0616717606419430.423319.28036.009
49799111128441763138654631692166.61311329939060544
26 × 13 × 13617715217
2020-06-1864136177152173.0332149.12278.51
49799112830673522055328570092167.94028420924812264
23 × 32 × 41 × 9627684557
2019-08-274196276845577.9467105.43196.91
497991110907541446978010757032269.886109515425546541
3 × 7 × 53 × 80449 × 1223093
2023-06-0780449122309328.4480.02870.0329
4979911103589884726630946731132373.1331040077671334196
22 × 11 × 19267 × 1226871277
2023-06-07192671226871277508.5013.43825.092
49799112833101286265266607663338812787.87328445300390561865540
22 × 3 × 5 × 41 × 73 × 653 × 242571277771
2023-06-076532425712777718,337,3422,656.24,961.1

247 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-06-07Stef42128G8000000800000012269.8861.7766.769%
2023-06-07Stef42128G25000000400378248270249161.0065,61225.148%
2023-06-09Stef42128G2500000005155347367170
skipped known factor: 49799111
skipped known factor: 77379523077506297
skipped known factor: 14642293098941811911
skipped known factor: 112844176313865463169
skipped known factor: 283067352205532857009
skipped known factor: 1090754144697801075703
skipped known factor: 10358988472663094673113
skipped known factor: 283310128626526660766333881
--72,23931.372%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2023-06-09USAFSS6917th_Scty_Sq5120001484800027--0.310
2023-06-09USAFSS6917th_Scty_Sq5120005120000065--0.700


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2015-03-09TJAOIManual testing256257*
56.103
17
0.000
2017-04-06TJAOIManual testing263264*
63.667
20
0.263
2022-07-31LordJuliusManual testing264266
2020-06-18TJAOIManual testing266267*
66.613
21
1.839


ECM factoring results:
Total ECM effort:0.421 GHz-days
Estimated T-Level:0.385
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020.421


Lucas-Lehmer results:
No L-L results for M4979911


PRP results:
dateuseridcompidcofactorsres64
2017-11-21kkmrkkblmbrbkc4.xlarge
49799111
77379523077506297
14642293098941811911
80F3D5963126FDFE
2018-04-23Oliver KruseGTX-0
49799111
77379523077506297
14642293098941811911
80F3D5963126FDFE
2019-08-27mnd9libproj
49799111
77379523077506297
14642293098941811911
283067352205532857009
80F3D5963126FDFE
2020-06-19M Millercruncher
49799111
77379523077506297
14642293098941811911
283067352205532857009
112844176313865463169
80F3D5963126FDFE
2023-06-07Stef42128G
49799111
77379523077506297
14642293098941811911
112844176313865463169
283067352205532857009
1090754144697801075703
80F3D5963126FDFE
2023-06-07Stef42128G
49799111
77379523077506297
14642293098941811911
112844176313865463169
283067352205532857009
1090754144697801075703
283310128626526660766333881
10358988472663094673113
80F3D5963126FDFE


CERT results:
dateuseridcompid
2023-06-07Çhuffo
2023-06-07Serge NICOLA


P-1 factor-bounds graph:
B1 = 250000000, B2 = 5155347367170 (P-1 stage 2)
B1 = 25000000, B2 = 400378248270 (P-1 stage 2)
B1 = 250000000 (P-1 stage 1)
B1 = 25000000 (P-1 stage 1)
B1 = 8000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
109
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
266
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.38 ~= -15-bit
250
260
270
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290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00