10 REM Semiprime
20 PRINT "Enter an integer"
30 INPUT N
40 IF N < 0 THEN LET N = -N
50 IF N < 2 THEN GOTO 120
60 LET C = 0
70 LET F = 2
80 IF (N / F) * F = N THEN GOTO 150
90 LET F = F + 1
100 IF F > N THEN GOTO 120
110 GOTO 80
120 IF C = 2 THEN PRINT "It is a semiprime."
130 IF C <> 2 THEN PRINT "It is not a semiprime."
140 END
150 LET C = C + 1
160 LET N = N / F
170 GOTO 80