13b "works" at this point, but too slow

input1.txt

@@ -0,0 +1,200 @@
+1732
+1972
+1822
+1920
+1847
+1718
+1827
+1973
+1936
+1865
+1817
+1954
+1939
+1979
+1846
+1989
+1818
+398
+1786
+1900
+1949
+1161
+609
+1967
+1845
+1795
+1874
+1982
+2010
+1494
+1752
+1803
+1908
+1876
+1977
+1999
+1858
+1885
+1975
+1878
+1784
+1787
+1765
+1778
+1893
+1746
+1807
+1966
+1991
+1905
+1970
+1942
+1792
+1750
+713
+1871
+1860
+1931
+1976
+1771
+128
+390
+2006
+1801
+1946
+1914
+1833
+1515
+1958
+1737
+1887
+1962
+1895
+2004
+1747
+1841
+1793
+1948
+1790
+1808
+1957
+1770
+1960
+1952
+1932
+1782
+1762
+1898
+1919
+1909
+1929
+1964
+1848
+1959
+1381
+280
+1899
+1855
+1849
+1889
+1772
+1843
+1767
+1830
+1838
+1869
+1926
+1768
+1789
+1791
+1888
+1371
+2001
+1943
+1741
+1904
+1468
+1969
+1910
+649
+1953
+1916
+1852
+1996
+1842
+1950
+1850
+1998
+1963
+1780
+1883
+1955
+443
+1773
+1896
+1985
+1809
+2007
+1819
+1891
+1853
+1802
+1861
+1813
+1831
+1974
+1915
+1997
+2000
+1945
+1832
+1763
+1981
+1922
+1862
+1944
+1925
+1742
+1744
+1994
+1961
+1881
+1937
+1911
+1788
+1971
+1890
+1734
+1781
+1984
+1912
+1834
+1766
+1769
+1797
+195
+1965
+1934
+1894
+1928
+1759
+1812
+1758
+1988
+1821
+1776
+2009
+1749
+1857
+1785
+1824
+1796
+1930
+1777
+1886
+477
+1761
+1800
+1745
+1993

input10.txt

@@ -0,0 +1,100 @@
+30
+73
+84
+136
+132
+117
+65
+161
+49
+68
+139
+46
+21
+127
+109
+153
+163
+160
+18
+22
+131
+146
+62
+113
+172
+150
+171
+98
+93
+130
+170
+59
+1
+110
+2
+55
+37
+44
+148
+102
+40
+28
+35
+43
+56
+169
+33
+5
+141
+83
+15
+105
+142
+36
+116
+11
+45
+82
+10
+17
+159
+140
+12
+108
+29
+72
+121
+52
+91
+166
+88
+97
+118
+99
+124
+149
+16
+9
+143
+104
+57
+79
+123
+58
+96
+24
+162
+23
+92
+69
+147
+156
+25
+133
+34
+8
+85
+76
+103
+122