#!/usr/local/bin/ruby
# >>141
MINIMAM_PRIME = 2
LINES_MAX    = 10000

class PrimeLine
    attr_accessor :result
    attr_accessor :prime
    attr_accessor :current

    def initialize( aValue )
        @prime = aValue
        @current = aValue << 1
    end

    # return value [ true ] mean [ may PRIME ]
    def check( value )
        @result = value != @current
        if ( ! @result )
            @current += @prime
        end
        return @result
    end
end