RosettaCodeData/Task/Almost-prime/GW-BASIC/almost-prime.basic

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10 'Almost prime
20 FOR K% = 1 TO 5
30 PRINT "k = "; K%; ":";
40 LET I% = 2
50 LET C% = 0
60 WHILE C% < 10
70 LET AN% = I%: GOSUB 1000
80 IF ISKPRIME <> 0 THEN PRINT USING " ###"; I%;: LET C% = C% + 1
90 LET I% = I% + 1
100 WEND
110 PRINT
120 NEXT K%
130 END
995 ' Check if n (AN%) is a k (K%) prime
1000 LET F% = 0
1010 FOR J% = 2 TO AN%
1020 WHILE AN% MOD J% = 0
1030 IF F% = K% THEN LET ISKPRIME = 0: RETURN
1040 LET F% = F% + 1
1050 LET AN% = AN% \ J%
1060 WEND
1070 NEXT J%
1080 LET ISKPRIME = (F% = K%)
1090 RETURN