Primo record

Lucas(140057)
29271 decimal digits

The certification of this number was done by Peter Kaiser and Paul Underwood with Primo 4.1.0. The certification process took 12 months : 6 months on 16 Xeon cores at 3.0 GHz (Peter) and 6 months on 32 AMD cores at 2.2 GHz (Paul).


20 greatest numbers certified with Primo
Lucas(140057)
29271 decimal digits
Certified by Peter Kaiser and Paul Underwood (EU, 2014) [more...]
Certificate: ecpp29271.7z (36.0 MB)
(283339 + 1) ÷ 3
25088 decimal digits
Certified by Tom Wu (US, 2014) [more...]
Certificate: ecpp25088.7z (24.6 MB)
Int(1.5137752) + 13566
24257 decimal digits
Certified by Pierre Cami (EU, 2015)
Certificate: ecpp24257.7z (22.9 MB)
Lehmer-Ramanujan(691,1523)
23770 decimal digits
Certified by Philippe Alsina, Pierre Gazzano, Nik Lygeros, Olivier Rozier and André Solaris (EU, 2014)
Certificate: ecpp23770.7z (23.1 MB)
Lehmer-Ramanujan(257,1699)
22506 decimal digits
Certified by Patrice Deloche, Nik Lygeros and Olivier Rozier (EU, 2014)
Certificate: ecpp22506.7z (21.2 MB)
1022250 + 57913
22251 decimal digits
Certified by Pierre Cami (EU, 2014)
Certificate: ecpp22251.7z (19.9 MB)
273845 + 14717
22230 decimal digits
Certified by Peter Kaiser (EU, 2013) [more...]
Certificate: ecpp22230.7z (19.1 MB)
273360 + 10711
22084 decimal digits
Certified by Peter Kaiser (EU, 2014) [more...]
Certificate: ecpp22084.7z (21.7 MB)
Phi(47498,10)
20160 decimal digits
Certified by Ray Chandler (US, 2014) [more...]
Certificate: ecpp20160.7z (16.9 MB)
Lehmer-Ramanujan(619,1297)
19900 decimal digits
Certified by Patrice Deloche, Nik Lygeros and Olivier Rozier (EU, 2014)
Certificate: ecpp19900.7z (19.0 MB)
Lucas(94823)
19817 decimal digits
Certified by Paul Underwood (EU, 2014) [more...]
Certificate: ecpp19817.7z (15.5 MB)
Factor of Phi(8055,40734)
19632 decimal digits
Certified by Tom Wu (US, 2015) [more...]
Certificate: ecpp19632.7z (16.0 MB)
(263703 - 1) ÷ 42808417
19169 decimal digits
Certified by David Metcalfe (EU, 2014) [more...]
Certificate: ecpp19169.7z (15.4 MB)
Lucas(89849)
18778 decimal digits
Certified by Paul Underwood (EU, 2014) [more...]
Certificate: ecpp18778.7z (14.5 MB)
primV(145353)
18689 decimal digits
Certified by Dana Jacobsen (US, 2013) [more...]
Certificate: ecpp18689.7z (14.2 MB)
Phi(59772,10)
18688 decimal digits
Certified by Ray Chandler (US, 2014) [more...]
Certificate: ecpp18688.7z (14.6 MB)
Factor of Phi(13338,63847)
18666 decimal digits
Certified by Tom Wu (US, 2013) [more...]
Certificate: ecpp18666.7z (13.4 MB)
587 × 43103# ÷ 2310 + 657402
18662 decimal digits
Certified by Pierre Cami (EU, 2013) [more...]
Certificate: ecpp18662b.7z (14.4 MB)
587 × 43103# ÷ 2310 - 455704
18662 decimal digits
Certified by Pierre Cami (EU, 2013) [more...]
Certificate: ecpp18662.7z (13.8 MB)
Lehmer-Ramanujan(821,1163)
18626 decimal digits
Certified by Nik Lygeros, Olivier Rozier and Keira Stambolidou (EU, 2014)
Certificate: ecpp18626.7z (16.5 MB)


ECPP records set with Primo
Lucas(140057)
29271 decimal digits
Certified by Peter Kaiser and Paul Underwood (EU, 2014) [more...]
Certificate: ecpp29271.7z (36.0 MB)
(32 × 106959 - 23) ÷ 99
6959 decimal digits
Certified by Hans Rosenthal (EU, 2003).
Certificate: ecpp6959.zip (4.3 MB)
16282536 ... 36478311
5878 decimal digits
Certified by Jose Luis Gomez Pardo (EU, 2003).
Certificate: ecpp5878b.zip (3.1 MB)
105019 + 43157099231631693
5020 decimal digits
Certified by Giovanni and Marco La Barbera (EU, 2001).
Certificate: ecpp5020.zip (2.1 MB)
103999 + 4771
4000 decimal digits
Certified by Giovanni and Marco La Barbera (EU, 2001).
Certificate: ecpp4000.zip (1.3 MB)
(3481223 - 1) ÷ 347
3106 decimal digits
Certified by Giovanni and Marco La Barbera (EU, 2001).
(301789 - 1) ÷ 29
2642 decimal digits
Certified by Giovanni and Marco La Barbera (EU, 2000).


Other primes

Links to some pages reporting primes certified with Primo:

Valid XHTML 1.0 Strict