A109348 Zsigmondy numbers for a = 7, b = 3: Zs(n, 7, 3) is the greatest divisor of 7^n - 3^n that is relatively prime to 7^m - 3^m for all positive integers m < n.

4, 5, 79, 29, 4141, 37, 205339, 1241, 127639, 341, 494287399, 2041, 24221854021, 82573, 3628081, 2885681, 58157596211761, 109117, 2849723505777919, 4871281, 8607961321, 197750389, 6842186811484434379, 5576881, 80962848274370701

Offset: 1

Author

Jonathan Vos Post, Aug 21 2005

Keywords

• nonn

Links

• Eric Weisstein's World of Mathematics, Zsigmondy's Theorem

Crossrefs

Cf. A064078-A064083, A109325, A109347, A109349.

Extensions

Edited, corrected and extended by Ray Chandler, Aug 26 2005

Definition corrected by Jerry Metzger, Nov 04 2009