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Old 2009-05-12, 19:26   #496
PCZ
 
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1815*2^627840-1 Already in Database
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Old 2009-05-12, 23:02   #497
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1793*2^628976-1, It appears to be 189344 digits long - submitted
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Old 2009-05-13, 07:13   #498
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1841*2^629982-1 New Prime
1881*2^629917-1 New Prime
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Old 2009-05-13, 11:00   #499
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LaurenU2 found:

1975*2^630413-1 is prime
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Old 2009-05-13, 21:39   #500
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LaurenU2 found:

1485*2^630611-1 is prime
1965*2^630845-1 is prime
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Old 2009-05-14, 05:06   #501
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LaurenU2 found:

1637*2^632272-1 is prime

Fozzie found:

1801*2^634053-1 is prime

LaurenU2 found:

1733*2^637904-1 is prime

LaurenU2 found:

1763*2^640656-1 is prime

Last fiddled with by mdettweiler on 2009-09-21 at 02:36 Reason: merged (cleanup)
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Old 2009-05-15, 07:51   #502
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1495*2^635021-1 New

1539*2^635844-1 is Prime (New)

2535*2^426158-1 is Prime

2579*2^428252-1 is Prime

Last fiddled with by mdettweiler on 2009-09-21 at 02:37 Reason: merged (cleanup)
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Old 2009-05-15, 14:57   #503
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1995*2^636339-1 New Prime

1741*2^637157-1 New Prime

1455*2^645453-1 New Prime

1509*2^650501-1 New Prime

1877*2^651256-1 New Prime

Last fiddled with by mdettweiler on 2009-09-21 at 02:38 Reason: merged (cleanup)
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Old 2009-05-16, 02:58   #504
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1975*2^637595-1 is prime
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Old 2009-05-18, 22:27   #505
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1863*2^644951-1, It appears to be 194153 digits long - submitted

1851*2^656958-1 is Prime! It appears to be 197768 digits long- submitted

Last fiddled with by mdettweiler on 2009-09-21 at 02:38 Reason: merged (cleanup)
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Old 2009-05-19, 10:11   #506
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LaurenU2 found:

1785*2^646070-1 is prime

The 72nd prime for the very prolific k=1785.

Edit: k=1455 that Brian just found a prime for is even more prolific; now with 78 primes.

LaurenU2 found a nice pair:

1627*2^647673-1 is prime
1431*2^647763-1 is prime

LaurenU2 went on one of his patented runs:

1575*2^648997-1 is confirmed prime
1757*2^649008-1 is prime
1877*2^649526-1 is prime
1791*2^649689-1 is prime
1985*2^649728-1 is prime


That's amazing for such a large n-range!

Fozzie found:

1745*2^650260-1 is prime

LaurenU2 found:

1991*2^654810-1 is prime
1559*2^655252-1 is prime

LaurenU2 found:

1635*2^656285-1 is prime

LaurenU2 found:

1793*2^656912-1 is prime

Fozzie found:

1505*2^657540-1 is prime

LaurenU2 found:

1815*2^659158-1 is confirmed prime
1495*2^659159-1 is prime

LaurenU2 found:

1617*2^660752-1 is prime

Helix-Von-Smelix found:

1573*2^662203-1 is prime


The prime was reported incorrectly at top-5000. I am in the process of getting it corrected.

I confirmed my own prime:

2145*2^425089-1 is confirmed prime

2507*2^425734-1 is prime

2425*2^426537-1 is prime
2477*2^427220-1 is prime
2183*2^427880-1 is prime
2565*2^427924-1 is confirmed prime

2569*2^428333-1 is prime

Last fiddled with by mdettweiler on 2009-09-21 at 02:40 Reason: merged (cleanup)
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