No it doesn’t. Well, it caps at 577 at GR150. It used to cap at GR42, but the cap was removed in 2.3.0 (before season 4).
Now it’s an additional 3 shards per rift above GR42. E.g. GR100 is 427 shards, GR101 is 430 shards, …, up to GR150 at 577 shards.
XP is an additional 5% XP (multiplicatively) per level above GR70. Enemy HP is 17% multiplicatively per level. Incoming damage is 2.338% multiplicatively per level above GR70.
Some shortcuts: Enemy HP doubles about every 5 levels (a little under actually). XP doubles about every 15 levels. Incoming damage doubles about every 30 levels.
Here is the full table. Health, damage, and XP should be multipliers relative to Normal difficulty.
| Greater Rift | Health | Damage | XP | Shards |
|---|---|---|---|---|
| 1 | 2.0 | 1.3 | 1.0 | 40 |
| 2 | 2.3 | 1.5 | 1.1 | 41 |
| 3 | 2.7 | 1.7 | 1.3 | 43 |
| 4 | 3.2 | 1.9 | 1.4 | 45 |
| 5 | 3.7 | 2.1 | 1.6 | 48 |
| 6 | 4.4 | 2.4 | 1.8 | 50 |
| 7 | 5.1 | 2.7 | 2.0 | 52 |
| 8 | 6.0 | 3.1 | 2.3 | 55 |
| 9 | 7.0 | 3.5 | 2.6 | 57 |
| 10 | 8.2 | 4.0 | 2.9 | 60 |
| 11 | 9.6 | 4.5 | 3.3 | 63 |
| 12 | 11.2 | 5.1 | 3.7 | 66 |
| 13 | 13.2 | 5.8 | 4.2 | 69 |
| 14 | 15.4 | 6.5 | 4.7 | 72 |
| 15 | 18.0 | 7.4 | 5.3 | 76 |
| 16 | 21.1 | 8.3 | 6.0 | 79 |
| 17 | 24.7 | 9.5 | 6.8 | 83 |
| 18 | 28.9 | 10.7 | 7.6 | 87 |
| 19 | 33.8 | 12.1 | 8.6 | 91 |
| 20 | 39.5 | 13.7 | 9.7 | 95 |
| 21 | 46.2 | 15.5 | 10.9 | 100 |
| 22 | 54.1 | 17.6 | 12.3 | 104 |
| 23 | 63.3 | 19.9 | 13.9 | 109 |
| 24 | 74.0 | 22.5 | 15.6 | 115 |
| 25 | 86.6 | 25.5 | 17.6 | 120 |
| 26 | 101.3 | 27.3 | 19.0 | 126 |
| 27 | 118.5 | 29.3 | 20.6 | 132 |
| 28 | 138.7 | 31.4 | 22.2 | 138 |
| 29 | 162.3 | 33.6 | 24.0 | 144 |
| 30 | 189.9 | 36.0 | 25.9 | 151 |
| 31 | 222.1 | 38.6 | 28.0 | 158 |
| 32 | 259.9 | 41.4 | 30.2 | 166 |
| 33 | 304.1 | 44.4 | 32.6 | 174 |
| 34 | 355.8 | 47.6 | 35.2 | 182 |
| 35 | 416.2 | 51.0 | 38.1 | 190 |
| 36 | 487.0 | 54.6 | 41.1 | 199 |
| 37 | 569.8 | 58.5 | 44.4 | 209 |
| 38 | 666.7 | 62.7 | 47.9 | 219 |
| 39 | 780.0 | 67.3 | 51.8 | 229 |
| 40 | 912.6 | 72.1 | 55.9 | 240 |
| 41 | 1,067.7 | 77.3 | 60.4 | 250 |
| 42 | 1,249.3 | 82.8 | 65.2 | 253 |
| 43 | 1,461.6 | 88.7 | 70.4 | 256 |
| 44 | 1,710.1 | 95.1 | 76.1 | 259 |
| 45 | 2,000.8 | 101.9 | 82.2 | 262 |
| 46 | 2,341.0 | 109.2 | 88.7 | 265 |
| 47 | 2,738.9 | 117.1 | 95.8 | 268 |
| 48 | 3,204.5 | 125.5 | 103.5 | 271 |
| 49 | 3,749.3 | 134.5 | 111.8 | 274 |
| 50 | 4,386.7 | 144.2 | 120.7 | 277 |
| 51 | 5,132.4 | 154.5 | 130.4 | 280 |
| 52 | 6,004.9 | 165.6 | 140.8 | 283 |
| 53 | 7,025.8 | 177.5 | 152.1 | 286 |
| 54 | 8,220.2 | 190.2 | 164.2 | 289 |
| 55 | 9,617.6 | 203.9 | 177.4 | 292 |
| 56 | 11,252.6 | 218.5 | 191.6 | 295 |
| 57 | 13,165.5 | 234.2 | 206.9 | 298 |
| 58 | 15,403.7 | 251.0 | 223.4 | 301 |
| 59 | 18,022.3 | 269.0 | 241.3 | 304 |
| 60 | 21,086.1 | 288.3 | 260.6 | 307 |
| 61 | 24,670.7 | 309.0 | 281.5 | 310 |
| 62 | 28,864.7 | 331.2 | 304.0 | 313 |
| 63 | 33,771.7 | 355.0 | 328.3 | 316 |
| 64 | 39,512.9 | 380.4 | 354.6 | 319 |
| 65 | 46,230.1 | 407.7 | 382.9 | 322 |
| 66 | 54,089.3 | 437.0 | 413.6 | 325 |
| 67 | 63,284.4 | 468.4 | 446.7 | 328 |
| 68 | 74,042.8 | 502.0 | 482.4 | 331 |
| 69 | 86,630.1 | 538.0 | 521.0 | 334 |
| 70 | 101,357.2 | 576.6 | 562.7 | 337 |
| 71 | 118,587.9 | 590.1 | 590.8 | 340 |
| 72 | 138,747.8 | 603.9 | 620.3 | 343 |
| 73 | 162,335.0 | 618.0 | 651.3 | 346 |
| 74 | 189,931.9 | 632.5 | 683.9 | 349 |
| 75 | 222,220.3 | 647.3 | 718.1 | 352 |
| 76 | 259,997.8 | 662.4 | 754.0 | 355 |
| 77 | 304,197.4 | 677.9 | 791.7 | 358 |
| 78 | 355,911.0 | 693.7 | 831.3 | 361 |
| 79 | 416,415.8 | 709.9 | 872.9 | 364 |
| 80 | 487,206.5 | 726.5 | 916.5 | 367 |
| 81 | 570,031.6 | 743.5 | 962.3 | 370 |
| 82 | 666,937.0 | 760.9 | 1,010.4 | 373 |
| 83 | 780,316.3 | 778.7 | 1,061.0 | 376 |
| 84 | 912,970.0 | 796.9 | 1,114.0 | 379 |
| 85 | 1,068,174.9 | 815.5 | 1,169.7 | 382 |
| 86 | 1,249,764.7 | 834.6 | 1,228.2 | 385 |
| 87 | 1,462,224.7 | 854.1 | 1,289.6 | 388 |
| 88 | 1,710,802.9 | 874.1 | 1,354.1 | 391 |
| 89 | 2,001,639.3 | 894.5 | 1,421.8 | 394 |
| 90 | 2,341,918.0 | 915.4 | 1,492.9 | 397 |
| 91 | 2,740,044.1 | 936.8 | 1,567.5 | 400 |
| 92 | 3,205,851.6 | 958.8 | 1,645.9 | 403 |
| 93 | 3,750,846.4 | 981.2 | 1,728.2 | 406 |
| 94 | 4,388,490.3 | 1,004.1 | 1,814.6 | 409 |
| 95 | 5,134,533.6 | 1,027.6 | 1,905.4 | 412 |
| 96 | 6,007,404.3 | 1,051.6 | 2,000.6 | 415 |
| 97 | 7,028,663.0 | 1,076.2 | 2,100.7 | 418 |
| 98 | 8,223,535.8 | 1,101.4 | 2,205.7 | 421 |
| 99 | 9,621,536.8 | 1,127.1 | 2,316.0 | 424 |
| 100 | 11,257,198.1 | 1,153.5 | 2,431.8 | 427 |
| 101 | 13,170,921.8 | 1,180.4 | 2,553.4 | 430 |
| 102 | 15,409,978.5 | 1,208.0 | 2,681.0 | 433 |
| 103 | 18,029,674.8 | 1,236.3 | 2,815.1 | 436 |
| 104 | 21,094,719.5 | 1,265.2 | 2,955.8 | 439 |
| 105 | 24,680,821.9 | 1,294.7 | 3,103.6 | 442 |
| 106 | 28,876,561.6 | 1,325.0 | 3,258.8 | 445 |
| 107 | 33,785,577.0 | 1,356.0 | 3,421.7 | 448 |
| 108 | 39,529,125.1 | 1,387.7 | 3,592.8 | 451 |
| 109 | 46,249,076.4 | 1,420.1 | 3,772.5 | 454 |
| 110 | 54,111,419.4 | 1,453.4 | 3,961.1 | 457 |
| 111 | 63,310,360.7 | 1,487.3 | 4,159.1 | 460 |
| 112 | 74,073,122.0 | 1,522.1 | 4,367.1 | 463 |
| 113 | 86,665,552.7 | 1,557.7 | 4,585.5 | 466 |
| 114 | 101,398,696.7 | 1,594.1 | 4,814.7 | 469 |
| 115 | 118,636,475.1 | 1,631.4 | 5,055.5 | 472 |
| 116 | 138,804,675.9 | 1,669.5 | 5,308.2 | 475 |
| 117 | 162,401,470.8 | 1,708.6 | 5,573.7 | 478 |
| 118 | 190,009,720.9 | 1,748.5 | 5,852.3 | 481 |
| 119 | 222,311,373.4 | 1,789.4 | 6,145.0 | 484 |
| 120 | 260,104,306.9 | 1,831.2 | 6,452.2 | 487 |
| 121 | 304,322,039.1 | 1,874.0 | 6,774.8 | 490 |
| 122 | 356,056,785.7 | 1,917.8 | 7,113.6 | 493 |
| 123 | 416,586,439.3 | 1,962.7 | 7,469.2 | 496 |
| 124 | 487,406,134.0 | 2,008.6 | 7,842.7 | 499 |
| 125 | 570,265,176.7 | 2,055.5 | 8,234.8 | 502 |
| 126 | 667,210,256.8 | 2,103.6 | 8,646.6 | 505 |
| 127 | 780,636,000.4 | 2,152.8 | 9,078.9 | 508 |
| 128 | 913,344,120.5 | 2,203.1 | 9,532.8 | 511 |
| 129 | 1,068,612,621.0 | 2,254.6 | 10,009.5 | 514 |
| 130 | 1,250,276,766.6 | 2,307.3 | 10,510.0 | 517 |
| 131 | 1,462,823,816.9 | 2,361.3 | 11,035.5 | 520 |
| 132 | 1,711,503,865.8 | 2,416.5 | 11,587.2 | 523 |
| 133 | 2,002,459,522.9 | 2,473.0 | 12,166.6 | 526 |
| 134 | 2,342,877,641.8 | 2,530.8 | 12,774.9 | 529 |
| 135 | 2,741,166,840.9 | 2,590.0 | 13,413.7 | 532 |
| 136 | 3,207,165,203.9 | 2,650.5 | 14,084.3 | 535 |
| 137 | 3,752,383,288.6 | 2,712.5 | 14,788.6 | 538 |
| 138 | 4,390,288,447.6 | 2,775.9 | 15,528.0 | 541 |
| 139 | 5,136,637,483.7 | 2,840.8 | 16,304.4 | 544 |
| 140 | 6,009,865,856.0 | 2,907.2 | 17,119.6 | 547 |
| 141 | 7,031,543,051.5 | 2,975.2 | 17,975.6 | 550 |
| 142 | 8,226,905,370.2 | 3,044.8 | 18,874.4 | 553 |
| 143 | 9,625,479,283.1 | 3,115.9 | 19,818.1 | 556 |
| 144 | 11,261,810,761.3 | 3,188.8 | 20,809.0 | 559 |
| 145 | 13,176,318,590.7 | 3,263.3 | 21,849.4 | 562 |
| 146 | 15,416,292,751.1 | 3,339.6 | 22,941.9 | 565 |
| 147 | 18,037,062,518.8 | 3,417.7 | 24,089.0 | 568 |
| 148 | 21,103,363,147.0 | 3,497.6 | 25,293.5 | 571 |
| 149 | 24,690,934,882.0 | 3,579.4 | 26,558.1 | 574 |
| 150 | 28,888,393,811.9 | 3,663.1 | 27,886.0 | 577 |