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A048518
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Primes containing only two different digits whose sum of digits is 28, the second perfect number.
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1
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1999, 9199, 338383, 383833, 1181881, 1881181, 1881811, 2222929, 2922229, 8118181, 8188111, 8881111, 9222229, 15551551, 15555151, 15555511, 16166611, 16616161, 33333373, 33733333, 34434343, 44334343, 44343433, 51155551
(list; graph; refs; listen; history; internal format)
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