Redmond-Sun conjecture
Conjecture. (Stephen Redmond & Zhi-Wei Sun) Given positive integers x and y, and exponents a and b (with all these numbers being greater than 1), if xa≠yb, then between xa and yb there are always primes, with only the following ten exceptions:
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1.
There are no primes between 23 and 32.
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2.
There are no primes between 52 and 33.
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3.
There are no primes between 25 and 62.
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4.
There are no primes between 112 and 53.
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5.
There are no primes between 37 and 133.
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6.
There are no primes between 55 and 562.
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7.
There are no primes between 1812 and 215.
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8.
There are no primes between 433 and 2822.
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9.
There are no primes between 463 and 3122.
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10.
There are no primes between 224342 and 555.
See A116086 in Sloane’s OEIS for a listing of the perfect powers beginning primeless ranges before the next perfect power. As of 2007, no further counterexamples have been found past 555.
Title | Redmond-Sun conjecture |
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Canonical name | RedmondSunConjecture |
Date of creation | 2013-03-22 17:26:50 |
Last modified on | 2013-03-22 17:26:50 |
Owner | PrimeFan (13766) |
Last modified by | PrimeFan (13766) |
Numerical id | 7 |
Author | PrimeFan (13766) |
Entry type | Conjecture |
Classification | msc 11N05 |