k=12121 is already reserved by the 12121 project, and tested at least up to n=500k.

Bump. Kosmaj, you are correct.
I'm unreserving k=12121 and reserving k=14141 instead.

Edit: How did I know this?
1. Go to Top 5000 search page.
2. At description, enter ^12121*2^%-1$
3. Check 'all verified primes' and search.
4. What do you see?

Anyway, here's the information of k=14141: (I didn't find any riesel primes on k=14141 on Top 5000 and riesel database)
1. Found these primes:
[code]14141*2^34-1
14141*2^58-1
14141*2^178-1
14141*2^190-1
14141*2^274-1
14141*2^934-1[/code]
2. Nash weight is 488 (lower than k=12121)

P.S: Under the name 'B. Jeong'

k=14141
 

No prime at 1k-40k.
Still testing. :smile:

I checked k=14141 from 1k-100k and 14141*2^61270-1 is the only prime in that range.
Still testing.

14141*2^160870-1 is prime! :smile:
k=14141 is tested to 161k. Still testing.

k=14141
 

Completed to 400k. I will test it to 700k. :smile:

Found primes:
14141*2^34-1 (15 digits)
14141*2^58-1 (22 digits)
14141*2^178-1 (58 digits)
14141*2^190-1 (62 digits)
14141*2^274-1 (87 digits)
14141*2^934-1 (286 digits)
14141*2^61270-1 (18449 digits)
14141*2^160870-1 (48431 digits)
[B]14141*2^292234-1 (87976 digits)[/B]

k=27114615
 

reservation post: [url]http://www.mersenneforum.org/showpost.php?p=223673&postcount=88[/url]

prime for n=
50500
65378
69151
69806
75079
91158
142758
144007
145227
148766

is tested to 150K. still working on it.

grueny

[QUOTE=grueny;224418]prime for n=
[...]
75079
[...][/QUOTE]

typo -> 75097!

k=14141
 

It completed to 700k! :smile:
I'm unreserving it now. No additional primes found.

Status of k=7605
 

92 primes, after completing 100-200k. I plan to fill all remaining gaps soon.

7, 9, 10, 13, 14, 19, 22, 25, 33, 39, 54, 62, 80, 89, 125, 127, 141, 144, 250, 295, 297, 314, 430, 475, 489, 680, 717, 766, 840, 922, 1090, 1201, 1210, 1213, 1342, 1420, 1560, 1941, 1997, 2065, 2085, 2101, 2314, 2369, 2790, 3065, 3715, 4600, 5469, 5961, 5986, 6295, 6994, 7194, 11120, 11950, 12219, 17994, 22895, 27754, 32782, 33625, 47609, 52194, 57697, 59549, 63087, 73563, 75164, 76139, 78245, 81089, 93082, 109185, 109816, 120119, 129027, 132217, 152957, 158815, 187846, 194193, 198766 [200k], ..., 353105, 358367, 438655, 454099, 524632, 530086, 595952, 698516, 728713 [333333-740k]

I think that a range of 700k at k=14141 is bit too small for this low weight k... :smile:
So I'm reserving it again.