Every even number from 4·1018 to 5·1018 is a sum of two primes.
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Campaign · [4·10¹⁸, 5·10¹⁸]
4.0·10¹⁸4.254.54.755.0·10¹⁸
B580 native, bottom-upbrowser devices, top-down (each slice verified twice)meeting point
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of the range verified
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even numbers checked
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B580 speed (evens/s)
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browser devices (evens/s)
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largest smallest-prime p(n)
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Top 30 ridges · largest smallest Goldbach prime p(n)
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even n
p(n)
q = n − p
found by
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How rare is each smallest prime? · evens with p(n) = p, p ≥ 3000
p(n) is the smallest prime p with n − p also prime. Counts on a log scale from every verified even of the campaign; the tail falls off roughly exponentially and the record holders sit at the right edge.