Prime Number

From Author Wars - https://authorwars.com/publications/prime-number-287363.html

Overview:

Title: Prime Number
Author: Harry Harrison
Year: 1987
ISBN-10: 0722144350
Publisher: Sphere
Price: £1.95
Pages: 191
Binding: Paperback
Type: Collection
Title Reference: Prime Number
Notes: Reprinted 1978, 1983 (twice), 1986, 1987 (twice).
Cover artist credited on rear.