Prime Number

From Author Wars - https://authorwars.com/publications/prime-number-126201.html

Overview:

Title: Prime Number
Author: Harry Harrison
Year: 1975
ISBN-10: 0722143907
Publisher: Sphere
Price: £0.60
Pages: 191
Binding: Paperback
Type: Collection
Title Reference: Prime Number
Notes: First printing. Other prices: Australia and New Zealand both $1.90.
Artist not credited, wrap around cover.