←1
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…1,1111,1121,1131,1141,115…1,1161,1171,1181,1191,1201,1211,1221,1231,1241,1251,1261,1271,1281,1291,1301,1311,1321,1331,1341,1351,1361,1371,1381,1391,1401,1411,1421,1431,1441,1451,1461,1471,1481,1491,1501,1511,1521,1531,1541,1551,1561,1571,1581,1591,1601,1611,1621,1631,1641,1651,1661,1671,1681,1691,1701,1711,1721,1731,1741,1751,1761,1771,1781,1791,1801,1811,1821,1831,1841,1851,1861,1871,1881,1891,1901,1911,1921,1931,1941,1951,1961,1971,1981,1991,2001,2011,2021,2031,2041,2051,2061,2071,2081,2091,2101,2111,2121,2131,2141,2151,2161,2171,2181,2191,2201,2211,2221,2231,2241,2251,2261,2271,2281,2291,2301,2311,2321,2331,2341,2351,2361,2371,2381,2391,2401,2411,2421,2431,2441,2451,2461,2471,2481,2491,2501,2511,2521,2531,2541,2551,2561,2571,2581,2591,2601,2611,2621,2631,2641,2651,2661,2671,2681,2691,2701,2711,2721,2731,2741,2751,2761,2771,2781,2791,2801,2811,2821,2831,2841,2851,2861,2871,2881,2891,2901,2911,2921,2931,2941,2951,2961,2971,2981,2991,3001,3011,3021,3031,3041,3051,3061,3071,3081,3091,3101,3111,3121,3131,3141,3151,3161,3171,3181,3191,3201,3211,3221,3231,3241,3251,3261,3271,3281,3291,3301,3311,3321,3331,3341,3351,3361,3371,3381,3391,3401,3411,3421,3431,3441,3451,3461,3471,3481,3491,3501,3511,3521,3531,3541,3551,3561,3571,3581,3591,3601,3611,3621,3631,3641,3651,3661,3671,3681,3691,3701,3711,3721,3731,3741,3751,3761,3771,3781,3791,3801,3811,3821,3831,3841,3851,3861,3871,3881,3891,3901,3911,3921,3931,3941,3951,3961,3971,3981,3991,4001,4011,4021,4031,4041,4051,4061,4071,4081,4091,4101,4111,4121,4131,4141,4151,4161,4171,4181,4191,4201,4211,4221,4231,4241,4251,4261,4271,4281,4291,4301,4311,4321,4331,4341,4351,4361,4371,4381,4391,4401,4411,4421,4431,4441,4451,4461,4471,4481,4491,4501,4511,4521,4531,4541,4551,4561,4571,4581,4591,4601,4611,4621,4631,4641,4651,4661,4671,4681,4691,4701,4711,4721,4731,4741,4751,4761,4771,4781,4791,4801,4811,4821,4831,4841,4851,4861,4871,4881,4891,4901,4911,4921,4931,4941,4951,4961,4971,4981,4991,5001,5011,5021,5031,5041,5051,5061,5071,5081,5091,5101,5111,5121,5131,5141,5151,5161,5171,5181,5191,5201,5211,5221,5231,5241,5251,5261,5271,5281,5291,5301,5311,5321,5331,5341,5351,5361,5371,5381,5391,5401,5411,5421,5431,5441,5451,5461,5471,5481,5491,5501,5511,5521,5531,5541,5551,5561,5571,5581,5591,5601,5611,5621,5631,5641,5651,5661,5671,5681,5691,5701,5711,5721,5731,5741,5751,5761,5771,5781,5791,5801,5811,5821,5831,5841,5851,5861,5871,5881,5891,5901,5911,5921,5931,5941,5951,5961,5971,5981,5991,6001,6011,6021,6031,6041,6051,6061,6071,6081,6091,6101,6111,6121,6131,6141,6151,6161,6171,6181,6191,6201,6211,6221,6231,6241,6251,6261,6271,6281,6291,6301,6311,6321,6331,6341,6351,6361,6371,6381,6391,6401,6411,6421,6431,6441,6451,6461,6471,6481,6491,6501,6511,6521,6531,6541,6551,6561,6571,6581,6591,6601,6611,6621,6631,6641,6651,6661,6671,6681,6691,6701,6711,6721,6731,6741,6751,6761,6771,6781,6791,6801,6811,6821,6831,6841,6851,6861,6871,6881,6891,6901,6911,6921,6931,6941,6951,6961,6971,6981,6991,7001,7011,7021,7031,7041,7051,7061,7071,7081,7091,7101,7111,7121,7131,7141,7151,7161,7171,7181,7191,7201,7211,7221,7231,7241,7251,7261,7271,7281,7291,7301,7311,7321,7331,7341,7351,7361,7371,7381,7391,7401,7411,7421,7431,7441,7451,7461,7471,7481,7491,7501,7511,7521,7531,7541,7551,7561,7571,7581,7591,7601,7611,7621,7631,7641,7651,7661,7671,7681,7691,7701,7711,7721,7731,7741,7751,7761,7771,7781,7791,7801,7811,7821,7831,7841,7851,7861,7871,7881,7891,7901,7911,7921,7931,7941,7951,7961,7971,7981,7991,8001,8011,8021,8031,8041,8051,8061,8071,8081,8091,8101,8111,8121,8131,8141,8151,8161,8171,8181,8191,8201,8211,8221,8231,8241,8251,8261,8271,8281,8291,8301,8311,8321,8331,8341,8351,8361,8371,8381,8391,8401,8411,8421,8431,8441,8451,8461,8471,8481,8491,8501,8511,8521,8531,8541,8551,8561,8571,8581,8591,8601,8611,8621,8631,8641,8651,8661,8671,8681,8691,8701,8711,8721,8731,8741,8751,8761,8771,8781,8791,8801,8811,8821,8831,8841,8851,8861,8871,8881,8891,8901,8911,8921,8931,8941,8951,8961,8971,8981,8991,9001,9011,9021,9031,9041,9051,9061,9071,9081,9091,9101,9111,9121,9131,9141,9151,9161,9171,9181,9191,9201,9211,9221,9231,9241,9251,9261,9271,9281,9291,9301,9311,9321,9331,9341,9351,9361,9371,9381,9391,9401,9411,9421,9431,9441,9451,9461,9471,9481,9491,950
1951→