Successive prime differences: Difference between revisions
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last group: 997141 997147 997151 997153
count: 306
</pre>
=={{header|Ruby}}==
<lang ruby>require 'prime'
PRIMES = Prime.each(1_000_000).to_a
difs = [[2], [1], [2,2], [2,4], [4,2], [6,4,2]]
difs.each do |ar|
res = PRIMES.each_cons(ar.size+1).select do |slice|
slice.each_cons(2).zip(ar).all? {|(a,b), c| a+c == b}
end
puts "#{ar} has #{res.size} sets. #{res.first}...#{res.last}"
end
</lang>
{{output}}
<pre>[2] has 8169 sets. [3, 5]...[999959, 999961]
[1] has 1 sets. [2, 3]...[2, 3]
[2, 2] has 1 sets. [3, 5, 7]...[3, 5, 7]
[2, 4] has 1393 sets. [5, 7, 11]...[999431, 999433, 999437]
[4, 2] has 1444 sets. [7, 11, 13]...[997807, 997811, 997813]
[6, 4, 2] has 306 sets. [31, 37, 41, 43]...[997141, 997147, 997151, 997153]
</pre>
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