Primes p such that p-1 is a highly composite number.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =13a(5) =37a(6) =61a(7) =181a(8) =241a(9) =2521a(10) =7561a(11) =15121a(12) =20161a(13) =45361a(14) =55441a(15) =110881a(16) =332641a(17) =498961a(18) =4324321a(19) =14414401a(20) =43243201a(21) =110270161a(22) =183783601a(23) =367567201a(24) =4655851201a(25) =13967553601a(26) =73329656401a(27) =293318625601