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Old 2020-06-11, 20:13   #257
carpetpool
 
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"Sam"
Nov 2016

13×23 Posts
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I don't suppose newpgen + pfgw would be faster than twinsieve ?


Here are the twin primes bases up to 48:

Code:
k*b^n+-1 with k <= n

base = 3	(check to n=15000)
2*3^2+1
8*3^10+1
4*3^15+1
10*3^22+1
10*3^102+1
76*3^139+1
928*3^988+1
476*3^1483+1
2618*3^4286+1
2926*3^11071+1
---
base = 5	(check to n=2000)
12*5^51+1
84*5^103+1
156*5^202+1
336*5^765+1
---
base = 6	(check to n=2000)
1*6^1+1
2*6^2+1
2*6^3+1
2*6^4+1
3*6^6+1
17*6^35+1
23*6^67+1
143*6^162+1
187*6^251+1
152*6^279+1
157*6^371+1
257*6^824+1
430*6^1318+1
1743*6^1916+1
613*6^1922+1
---
base = 7	(check to n=2000)
(none)
---
base = 10	(check to n=2000)
3*10^3+1
3*10^7+1
126*10^182+1
525*10^632+1
---
base = 11	(check to n=2000)
1182*11^1409+1
---
base = 12	(check to n=2000)
1*12^1+1
4*12^5+1
4*12^15+1
860*12^967+1
---
base = 13	(check to n=2000)
180*13^202+1
228*13^428+1
---
base = 14	(check to n=2000)
(none)
---
base = 15	(check to n=2000)
2*15^10+1
14*15^14+1
2*15^20+1
238*15^353+1
---
base = 17	(check to n=2000)
(none)
---
base = 18	(check to n=2000)
1*18^1+1
9*18^11+1
231*18^307+1
357*18^1664+1
---
base = 19	(check to n=2000)
(none)
---
base = 20	(check to n=2000)
24*20^36+1
3*20^69+1
105*20^152+1
---
base = 21	(check to n=2000)
8*21^26+1
22*21^26+1
30*21^44+1
52*21^55+1
418*21^1919+1
---
base = 22	(check to n=2000)
(none)
---
base = 23	(check to n=2000)
(none)
---
base = 24	(check to n=2000)
13*24^23+1
10*24^66+1
---
base = 26	(check to n=2000)
210*26^742+1
837*26^1244+1
---
base = 28	(check to n=2000)
12*28^16+1
---
base = 29	(check to n=2000)
(none)
---
base = 30	(check to n=2000)
1*30^1+1
14*30^43+1
141*30^169+1
14*30^262+1
446*30^504+1
1389*30^1563+1
---
base = 31	(check to n=2000)
168*31^183+1
---
base = 33	(check to n=2000)
(none)
---
base = 34	(check to n=2000)
3*34^11+1
255*34^676+1
828*34^856+1
---
base = 35	(check to n=2000)
930*35^1167+1
---
base = 37	(check to n=2000)
(none)
---
base = 38	(check to n=2000)
3*38^10+1
9*38^53+1
45*38^111+1
---
base = 39	(check to n=2000)
608*39^706+1
---
base = 40	(check to n=2000)
30*40^39+1
3*40^324+1
273*40^326+1
132*40^574+1
---
base = 41	(check to n=2000)
168*41^261+1
312*41^1208+1
---
base = 42	(check to n=2000)
1*42^1+1
5*42^9+1
6*42^57+1
90*42^121+1
53*42^158+1
652*42^746+1
---
base = 43	(check to n=2000)
30*43^1525+1
---
base = 44	(check to n=2000)
3*44^9+1
---
base = 45	(check to n=2000)
2*45^8+1
84*45^84+1
268*45^318+1
136*45^768+1
308*45^970+1
---
base = 46	(check to n=2000)
18*46^25+1
267*46^358+1
---
base = 47	(check to n=2000)
(none)
---
base = 48	(check to n=2000)
4*48^7+1
2*48^8+1
3*48^8+1
24*48^323+1
30*48^673+1
---

Last fiddled with by carpetpool on 2020-06-11 at 20:14
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