Actually there are a few questions about A050444. First, there is the question of how spaces and dashes and the word "and" in number names affects the sequence. Certain features of the sequence tend to convince me that spaces and dashes and the word "and" are not included in the comparisons. This is consistent with "Knuth's Number" 8018018851 being the lexically first prime. But whatever the comparison criteria, there are definite errors in the sequence. For instance, the numbers 11 and 18049 are missing, as well as Knuth's number 8018018851. Anyway, here is what I get for A050444: 2 3 5 11 83 89 809 811 881 18013 18041 18049 18059 18089 18803 18839 18859 18000041 18000089 18000803 18000811 18000883 18000887 18000889 18018017 18018043 18018047 18018053 18018059 18018839 18018841 18018883 8000000011 8000000081 8000000809 8000000851 8000018009 8000018051 8000018087 8000018809 8000018881 8018000021 8018000059 8018000087 8018000839 8018000867 8018018009 8018018051 8018018081 8018018089 8018018819 8018018849 8018018851