# GroestlCoin (GRS) — Solo Mining Pools & Network State

Live solo mining pool comparison, network difficulty, block reward structure, and Poisson solo mining probabilities for GroestlCoin, as measured by BackPow.

## Network Overview

| Metric | Value | Unit |
| --- | --- | --- |
| Algorithm | Groestl | |
| Network hashrate | 5458547450125.42 | H/s |
| Difficulty | 79919.43388539083 | |
| Difficulty, 24h average | 66469.753 | |
| Difficulty, 7d average | 66763.988 | |
| Block time, observed | 62.937 | seconds |
| Block reward | 5.0 | GRS |
| Spot price | 0.0268845154402981 | USD |
| Block value | 0.1344225772014905 | USD |
| Tracked solo pools | 2 | count |
| Recommended solo pool | mining-dutch.nl (1%) | |

## Tracked Solo Pools

| Pool | Solo Fee (%) | Avg Hashrate 7d (raw) | Avg Hashrate 7d | Reliability | Pool URL |
| --- | --- | --- | --- | --- | --- |
| mining-dutch.nl | 1 | 4524893919345.679 | 4.52 TH/s | OK | https://www.mining-dutch.nl/pools/groestlcoin.php |
| retromike.net | 1 | 56562926578.39505 | 56.56 GH/s | OK | http://retromike.net/#grs |

## Expected Time to Solo Mine a Block (Poisson Model)

Block discovery is modeled as a memoryless Poisson process: `P(X >= 1) = 1 - exp(-t / T)` where `T = (Network Hashrate / Miner Hashrate) * Block Time`.

| Hardware / Scenario | Hashrate (raw H/s) | Hashrate (display) | Expected Time | 30-Day Probability |
| --- | --- | --- | --- | --- |
| 1× Baikal BK-G28 | 27994400000.0 | 27.99 GH/s | 3.4 hours | 100.0% |
| 10× Baikal BK-G28 | 279944000000.0 | 279.94 GH/s | 20 min | 100.0% |
| 100× Baikal BK-G28 | 2799440000000.0 | 2.80 TH/s | 2 min | 100.0% |

## Solo Mining Protocol Rules

- Direct Coinbase Payout: When a solo miner finds a block, the pool constructs the block template with the miner's payout address directly in the coinbase transaction.
- Con Kolivas' Solo CKPool: Regarded as the historical benchmark for Bitcoin solo mining. Its pure C daemon processes shares with zero database overhead and pays miners directly through coinbase transaction outputs.
- Maturation: Newly minted coins require confirmation maturity (typically 100 blocks on Bitcoin and most PoW networks) before they can be transferred or spent.
- Pool Fee Structure: Unlike PPS/PPLNS pools that deduct fees from shared round rewards, solo pools deduct their percentage fee exclusively upon block discovery.
- High Variance: Finding blocks solo is subject to Poisson variance; expected time is a mathematical expectation over many trials, not a countdown timer.

## Provenance

- Retrieved: 2026-10-07T20:25:28Z
- Canonical page: https://backpow.com/solo-pools/GroestlCoin
- Coin economics & CoP datasheet: https://backpow.com/GroestlCoin.md
- All solo pools directory: https://backpow.com/solo-pools.md
- Solo mining odds calculator: https://backpow.com/GroestlCoin
- Live queries over MCP: https://mcp.backpow.com/mcp (tools `calculate_solo_mining_odds`, `get_coin_oracle`)
- Licence: CC BY 4.0 — https://backpow.com/llms.txt

Difficulty, hashrate and price move continuously. This file is a snapshot taken at the time above; for a current reading, query the MCP endpoint rather than caching this document.