| 7: | 21 | = | 2*101+1 |
| 7: | 1001 | = | 103+1 |
| 8: | 8 | = | 101-2 |
| 9: | 9 | = | 101-1 |
| 11: | 11 | = | 101+1 |
| 13: | 13 | = | 101+3 |
| 13: | 1001 | = | 103+1 |
| 17: | 17 | = | 101+7 |
| 17: | 102 | = | 102+2 |
| 17: | 100000001 | = | 108+1 |
| 19: | 19 | = | 2*101-1 |
| 23: | 299 | = | 3*102-1 |
| 23: | 2001 | = | 2*103+1 |
| 27: | 999 | = | 103-1 |
| 29: | 29 | = | 3*101-1 |
| 29: | 2001 | = | 2*103+1 |
| 29: | 100000000000001 | = | 1014+1 |
| 31: | 31 | = | 3*101+1 |
| 31: | 999998 | = | 106-2 |
| 32: | 96 | = | 102-4 |
| 37: | 999 | = | 103-1 |
| 41: | 41 | = | 4*101+1 |
| 41: | 99999 | = | 105-1 |
| 43: | 301 | = | 3*102+1 |
| 47: | 94 | = | 102-6 |
| 47: | 300001 | = | 3*105+1 |
| 47: | 10000002 | = | 107+2 |
| 49: | 98 | = | 102-2 |
| 53: | 106 | = | 102+6 |
| 53: | 1000004 | = | 106+4 |
| 59: | 1003 | = | 103+3 |
| 59: | 20001 | = | 2*104+1 |
| 61: | 10004 | = | 104+4 |
| 67: | 201 | = | 2*102+1 |
| 71: | 71 | = | 7*101+1 |
| 71: | 994 | = | 103-6 |
| 71: | 1999999 | = | 2*106-1 |
| 73: | 10001 | = | 104+1 |
| 79: | 79 | = | 8*101-1 |
| 83: | 996 | = | 103-4 |
| 89: | 89 | = | 9*101-1 |
|
| 89: | 801 | = | 8*102+1 |
| 89: | 1000004 | = | 106+4 |
| 89: | 199999999 | = | 2*108-1 |
| 97: | 97 | = | 102-3 |
| 101: | 101 | = | 102+1 |
| 103: | 103 | = | 102+3 |
| 107: | 107 | = | 102+7 |
| 107: | 10000006 | = | 107+6 |
| 109: | 109 | = | 102+9 |
| 113: | 20001 | = | 2*104+1 |
| 127: | 8001 | = | 8*103+1 |
| 127: | 999998 | = | 106-2 |
| 131: | 29999 | = | 3*104-1 |
| 137: | 10001 | = | 104+1 |
| 139: | 10008 | = | 104+8 |
| 149: | 100000009 | = | 108+9 |
| 151: | 399999 | = | 4*105-1 |
| 157: | 100009 | = | 105+9 |
| 163: | 200001 | = | 2*105+1 |
| 167: | 1002 | = | 103+2 |
| 169: | 100000004 | = | 108+4 |
| 173: | 99994 | = | 105-6 |
| 181: | 40001 | = | 4*104+1 |
| 191: | 9999996 | = | 107-4 |
| 193: | 699999999 | = | 7*108-1 |
| 197: | 7000001 | = | 7*106+1 |
| 199: | 199 | = | 2*102-1 |
| 227: | 6999999 | = | 7*106-1 |
| 229: | 29999 | = | 3*104-1 |
| 233: | 699 | = | 7*102-1 |
| 239: | 9999999 | = | 107-1 |
| 251: | 1004 | = | 103+4 |
| 263: | 9994 | = | 104-6 |
| 271: | 99999 | = | 105-1 |
| 277: | 99997 | = | 105-3 |
| 281: | 100000000000001 | = | 1014+1 |
| 289: | 99994 | = | 105-6 |
| 293: | 1000009 | = | 106+9 |
| 331: | 993 | = | 103-7 |
| 353: | 6001 | = | 6*103+1 |
| 353: | 10000000000000001 | = | 1016+1 |
|